Samsung QN900A 8k QLED vs TCL 6 Series/R648 2021 8k QLED Side-by-Side TV Comparison

Tested using Methodology v1.11

Updated Feb 07, 2025 06:36 PM

Resolution8k

TypeLED

Sub-TypeVA

Resolution8k

TypeLED

Sub-TypeVA

Variants

QN65QN900AFXZA (65")
QN75QN900AFXZA (75")
QN85QN900AFXZA (85")

65R648 (65")
75R648 (75")

Review

See Samsung QN900A 8k QLED review

See TCL 6 Series/R648 2021 8k QLED review

Our Verdict

Samsung QN900A 8k QLED

TCL 6 Series/R648 2021 8k QLED

The Samsung QN900A 8k QLED and the TCL 6 Series/R648 2021 8k QLED are both 8k TVs. They both feature Mini LED backlighting, and even though the local dimming feature on the Samsung does a better job at improving the contrast, they're both decent overall. The Samsung gets brighter in HDR, and it has wider viewing angles thanks to the 'Ultra Viewing Angle' layer. The Samsung also does a better job at upscaling 480p content, making it a better choice for watching DVDs.

Check Price

65"

QN65QN900AFXZA

65"

65R648

75"

QN75QN900AFXZA

75"

75R648

85"

QN85QN900AFXZA

85"

Notice: Two or more of the products selected have been tested with different test methodologies, so some of the results below aren't directly comparable. Learn how our test benches and scoring system work, and read more about the latest changes to our TVs test methodology.

Main Differences for

Threshold

0.10

Mixed Usage

8.1

7.9

480p Input

8.0

4.0

Contrast

7.5

8.9

Pre Calibration

6.7

8.9

Full Comparison

Mixed Usage

8.1

7.9

Movies

7.7

TV Shows

8.4

7.3

Sports

8.3

7.6

Video Games

8.4

8.6

HDR Movies

7.8

8.0

HDR Gaming

8.3

8.6

PC Monitor

8.7

8.6

Design

Style

Design Picture

Curved

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Accelerated Longevity Test

Uniformity Pictures

Month 24

50% Gray

Cycle through colors

Month 24

50% Gray

Cycle through colors

Longevity Graph

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Stand

Stand Picture

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Back

Back Picture

Wall Mount

VESA 400x300

VESA 400x400

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Borders

Borders Picture

Borders

0.08" (0.2 cm)

0.39" (1.0 cm)

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Thickness

Thickness Picture

Max Thickness

0.63" (1.6 cm)

2.99" (7.6 cm)

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Build Quality

9.0

7.5

Build quality picture

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Picture Quality

Contrast

7.5

8.9

Contrast Picture

Contrast

20,392 : 1

134,133 : 1

Native Contrast

1,658 : 1

3,065 : 1

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Blooming

7.5

Blooming Photo

Lighting Zone Transitions

7.5

Preferred LD Video, Moving Object

Local Dimming

Yes

Backlight

Full-Array

Dimming Zones Count Of Tested TV

160

Contrast And Dark Details In Game Mode

8.0

Blooming Photo In Game Mode

Preferred LD Video, Moving Object In Game Mode

Game Transitions With VRR And Preferred LD

HDR Brightness

8.9

8.2

HDR Hallway Photo

HDR Cityscape Photo

HDR Landscape Photo

Hallway Lights (~1950 cd/m²)

597 cd/m²

Yellow Skyscraper (~700 cd/m²)

353 cd/m²

Landscape Pool (~300 cd/m²)

255 cd/m²

Peak 2% Window

1,554 cd/m²

770 cd/m²

Peak 10% Window

1,590 cd/m²

1,067 cd/m²

Peak 25% Window

1,018 cd/m²

1,154 cd/m²

Peak 50% Window

618 cd/m²

817 cd/m²

Peak 100% Window

409 cd/m²

626 cd/m²

Sustained 2% Window

1,462 cd/m²

756 cd/m²

Sustained 10% Window

1,474 cd/m²

1,045 cd/m²

Sustained 25% Window

1,007 cd/m²

1,137 cd/m²

Sustained 50% Window

610 cd/m²

815 cd/m²

Sustained 100% Window

403 cd/m²

624 cd/m²

Automatic Brightness Limiting (ABL)

0.075

0.032

EOTF

Real Scene Highlight

1,440 cd/m²

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HDR Brightness In Game Mode

8.7

8.2

HDR Hallway Photo

HDR Cityscape Photo

HDR Landscape Photo

Hallway Lights (~1950 cd/m²)

597 cd/m²

Yellow Skyscraper (~700 cd/m²)

348 cd/m²

Landscape Pool (~300 cd/m²)

256 cd/m²

Peak 2% Window

1,642 cd/m²

771 cd/m²

Peak 10% Window

1,592 cd/m²

1,069 cd/m²

Peak 25% Window

1,034 cd/m²

1,161 cd/m²

Peak 50% Window

615 cd/m²

824 cd/m²

Peak 100% Window

401 cd/m²

632 cd/m²

Sustained 2% Window

1,544 cd/m²

761 cd/m²

Sustained 10% Window

1,497 cd/m²

1,054 cd/m²

Sustained 25% Window

1,019 cd/m²

1,148 cd/m²

Sustained 50% Window

608 cd/m²

822 cd/m²

Sustained 100% Window

394 cd/m²

631 cd/m²

Automatic Brightness Limiting (ABL)

0.078

0.032

Game Mode EOTF

Real Scene Highlight

1,083 cd/m²

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PQ EOTF Tracking

8.4

PQ EOTF Graph

600 Nit Tracking Delta

0.0102

1000 Nit Tracking Delta

0.0104

4000 Nit Tracking Delta

0.0105

SDR Brightness

8.9

Real Scene Peak Brightness

844 cd/m²

687 cd/m²

Peak 2% Window

1,364 cd/m²

724 cd/m²

Peak 10% Window

1,408 cd/m²

1,039 cd/m²

Peak 25% Window

896 cd/m²

1,123 cd/m²

Peak 50% Window

550 cd/m²

795 cd/m²

Peak 100% Window

386 cd/m²

608 cd/m²

Sustained 2% Window

1,285 cd/m²

720 cd/m²

Sustained 10% Window

1,333 cd/m²

1,018 cd/m²

Sustained 25% Window

891 cd/m²

1,106 cd/m²

Sustained 50% Window

543 cd/m²

792 cd/m²

Sustained 100% Window

381 cd/m²

606 cd/m²

Automatic Brightness Limiting (ABL)

0.073

0.033

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Color Gamut

8.2

8.6

Wide Color Gamut

Yes

Color Gamut DCI-P3 Picture

DCI P3 xy

93.63%

90.95%

DCI P3 uv

96.01%

96.19%

Color Gamut Rec.2020 Picture

Rec 2020 xy

67.58%

75.03%

Rec 2020 uv

70.84%

82.71%

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Color Volume

7.7

8.3

P3 Color Volume ITP Picture

1,000 cd/m² DCI P3 Coverage ITP

59.2%

77.1%

2020 Color Volume ITP Picture

10,000 cd/m² Rec 2020 Coverage ITP

43.4%

39.1%

White Luminance

743 cd/m²

Red Luminance

156 cd/m²

Green Luminance

528 cd/m²

Blue Luminance

64 cd/m²

Cyan Luminance

592 cd/m²

Magenta Luminance

221 cd/m²

Yellow Luminance

683 cd/m²

Normalized DCI P3 Coverage ITP

87.7%

Normalized Rec 2020 Coverage ITP

64.7%

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Local Dimming

7.0

LD Video, Moving Object

LD Video, Real Content

LD Video, Real Content Side View

Local Dimming

Yes

Backlight

Full-Array

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Pre Calibration

6.7

8.9

Pre White Balance Picture

Pre Gamma Curve Picture

Pre Color Picture

White Balance dE

4.80

1.97

Color dE

2.81

0.96

Gamma

1.96

2.13

Color Temperature

6,315 K

6,513 K

Picture Mode

Movie

Color Temp Setting

Warm 2

Warm

Gamma Setting

2.2

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Post Calibration

9.5

9.7

Post White Balance Picture

Post Gamma Curve Picture

Post Color Picture

White Balance dE

0.34

0.17

Color dE

1.08

0.57

Gamma

2.20

Color Temperature

6,465 K

6,503 K

White Balance Calibration

20 point

11 point

Color Calibration

Yes

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Gray Uniformity

7.8

7.4

50% Uniformity Picture

50% Std. Dev.

2.282%

1.286%

50% DSE

0.179%

0.202%

5% Uniformity Picture

5% Std. Dev.

0.968%

0.965%

5% DSE

0.080%

0.127%

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Black Uniformity

6.6

7.8

Black Uniformity Picture With Preferred Local Dimming

Std. Dev.

0.306%

0.829%

Native Black Uniformity Picture

Native Std. Dev.

2.337%

1.509%

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Viewing Angle

6.8

5.2

Viewing Angle Video

Chroma Graph

Color Washout

36°

21°

Hue Graph

Color Shift

25°

31°

Lightness Graph

Brightness Loss

47°

35°

Black Level Raise

70°

14°

Gamma Shift

17°

12°

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Reflections

8.9

8.4

Reflections Picture

Average Room Off Picture

Bright Room Off Picture

Screen Finish

Glossy

Semi-gloss

Total Reflections

2.3%

3.2%

Indirect Reflections

1.4%

1.0%

Calculated Direct Reflections

0.9%

2.2%

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Local Dimming In Game Mode

7.0

LD Video, Moving Object

LD Video, Real Content

LD Video, Real Content Side View

Local Dimming

Yes

Backlight

Full-Array

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HDR Native Gradient

7.9

7.5

HDR Gradient Picture

100% Black to 50% Gray

4.0

50% Gray to 100% White

8.0

100% Black to 50% Red

8.0

50% Red to 100% Red

100% Black to 50% Green

6.0

50% Green to 100% Green

8.0

100% Black to 50% Blue

6.0

50% Blue to 100% Blue

Color Depth

10 Bit

Red (Std. Dev.)

0.122

Green (Std. Dev.)

0.120

Blue (Std. Dev.)

0.090

Gray (Std. Dev.)

0.109

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Low-Quality Content Smoothing

5.6

Low-Quality Content Smoothing Picture

Smoothing

5.0

Detail Preservation

7.0

Upscaling: Sharpness Processing

8.0

4.0

Sharpness Picture - 480p

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Pixels

Pixels Picture

Subpixel Layout

BGR

Type

LED

Sub-Type

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720p Input

8.0

720p Picture

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1080p Input

9.0

1080p Picture

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4k Input

9.5

4k Picture

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8k Input

9.5

8k Picture

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Temporary Image Retention

Image Retention Picture

IR after 0 min recovery

0.00%

IR after 2 min recovery

0.00%

IR after 4 min recovery

0.00%

IR after 6 min recovery

0.00%

IR after 8 min recovery

0.00%

IR after 10 min recovery

0.00%

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Permanent Burn-In Risk

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Motion

Response Time

8.3

8.6

Motion Blur Picture

Response Time Chart

80% Response Time

4.6 ms

3.6 ms

100% Response Time

10.2 ms

9.5 ms

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Flicker-Free

9.9

Backlight chart

Flicker-Free

PWM Dimming Frequency

960 Hz

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Black Frame Insertion (BFI)

BFI Picture

BFI Frequency Picture

Optional BFI

Yes

Min Flicker For 60 fps

60 Hz

60Hz For 60 fps

Yes

120Hz For 120 fps

Yes

Min Flicker for 60 fps in Game Mode

60 Hz

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Motion Interpolation

Motion Interpolation (30 fps) Picture

Motion Interpolation (30 fps)

Yes

Motion Interpolation (60 fps) Picture

Motion Interpolation (60 fps)

Yes

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Stutter

6.8

6.7

Frame Hold Time @ 24 fps

31.5 ms

32.2 ms

Frame Hold Time @ 60 fps

6.5 ms

7.2 ms

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24p Judder

Judder-Free 24p

Yes

Judder-Free 24p via 60p

Yes

Judder-Free 24p via 60i

Yes

Judder-Free 24p via Native Apps

Yes

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Variable Refresh Rate

9.4

Native Refresh Rate

120 Hz

Variable Refresh Rate

Yes

HDMI Forum VRR

Unknown

Yes

FreeSync

Yes

G-SYNC Compatible

Yes

4k VRR Maximum

120 Hz

4k VRR Minimum

< 20 Hz

1080p VRR Maximum

120 Hz

1080p VRR Minimum

< 20 Hz

1440p VRR Maximum

120 Hz

1440p VRR Minimum

< 20 Hz

VRR + Local Dimming

Yes

VRR Supported Connectors

HDMI

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Inputs

Input Lag

9.7

9.4

1080p @ 60Hz

10.1 ms

15.3 ms

1080p @ 60Hz Outside Game Mode

101.1 ms

112.3 ms

1080p @ 120Hz

5.8 ms

6.3 ms

1080p @ 144Hz

N/A

1440p @ 60Hz

10.4 ms

15.2 ms

1440p @ 120Hz

5.9 ms

6.3 ms

1440p @ 144Hz

N/A

4k @ 60Hz

10.6 ms

15.1 ms

4k @ 60Hz + 10-Bit HDR

10.4 ms

15.2 ms

4k @ 60Hz @ 4:4:4

10.6 ms

15.1 ms

4k @ 60Hz Outside Game Mode

76.2 ms

110.6 ms

4k @ 60Hz With Interpolation

21.1 ms

103.9 ms

4k @ 120Hz

6.0 ms

6.2 ms

4k @ 144Hz

N/A

8k @ 60Hz

10.6 ms

15.2 ms

1080p with Variable Refresh Rate

1440p with VRR

4k with VRR

8k with VRR

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Supported Resolutions

Resolution

480p @ 59.94Hz (Widescreen)

Yes

720p @ 59.94Hz

Yes

1080p @ 60Hz @ 4:4:4

Yes

1080p @ 120Hz

Yes (native support)

Yes

1080p @ 144Hz

1440p @ 60Hz

Yes (native support)

Yes (forced resolution required)

1440p @ 120Hz

Yes (native support)

Yes

1440p @ 144Hz

4k @ 60Hz

Yes

4k @ 60Hz @ 4:4:4

Yes

4k @ 120Hz

Yes (native support)

Yes

4k @ 120Hz @ 4:4:4

Yes

4k @ 144Hz

8k @ 30Hz or 24Hz

Yes

8k @ 60Hz

Yes

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PS5 Compatibility

PS5 Screenshot

Auto Low Latency Mode (ALLM)

Yes

4k @ 120Hz

Yes

1440p @ 120Hz

PS5 can't do 1440p

Yes

1080p @ 120Hz

Yes

HDR

Yes

Xbox Series X Screenshot

VRR

PS5 can't do VRR yet

Yes

PS5, 4k @ 120Hz + HDR

Yes

PS5, 4k @ 60Hz + HDR

Yes

Xbox Series X, 4k @ 120Hz + HDR

Yes

Xbox Series X, 4k @ 120Hz

Yes

Xbox Series X, 4k @ 60Hz + HDR

Yes

Xbox Series X, 1440p @ 120Hz

Yes

Xbox Series X, 1080p @ 120Hz

Yes

Xbox Series X, Variable Refresh Rate

Yes

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Xbox Series X|S Compatibility

Xbox Series X Screenshot

Auto Low Latency Mode (ALLM)

Yes

4k @ 120Hz

Yes

1440p @ 120Hz

Yes

1080p @ 120Hz

Yes

HDR

Yes

VRR

Yes

Inputs Specifications

HDR10

Yes

HDR10+

Yes

Dolby Vision

Yes

HLG

Yes

HDMI 2.0 Full Bandwidth

Yes (HDMI 1,2,3,4)

HDMI 2.1 Class Bandwidth

Yes (HDMI 1,2,3,4)

Yes (HDMI 1,2)

CEC

Yes

HDCP 2.2

Yes (HDMI 1,2,3,4)

ATSC Tuner

1.0

USB 3.0

Variable Analog Audio Out

Yes

Wi-Fi Support

Yes (2.4 GHz, 5 GHz)

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Input Photos

Side Inputs Picture

Rear Inputs Picture

Total Inputs

HDMI

USB

Digital Optical Audio Out

Analog Audio Out 3.5mm

Analog Audio Out RCA

Component In

Composite In

Tuner (Cable/Ant)

Ethernet

DisplayPort

IR In

SD/SDHC

Audio Passthrough

ARC/eARC Port

Yes

eARC

eARC: Dolby Atmos Over Dolby Digital Plus

Yes

eARC: Dolby Digital Plus 7.1

Yes

eARC: LPCM 7.1 Over Dolby MAT

Yes

eARC: Dolby TrueHD 7.1

Yes

ARC

Yes (HDMI 3)

eARC: DTS:X Over DTS-HD MA

Yes

eARC: DTS-HD Master Audio 7.1

Yes

eARC: LPCM Channels (Bitstream)

2.0

ARC: Dolby Digital 5.1

Yes

ARC: DTS 5.1

Yes

Optical: Dolby Digital 5.1

Yes

Optical: DTS 5.1

Yes

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Sound Quality

Frequency Response

6.9

7.4

Frequency Response

Low-Frequency Extension

119.87 Hz

75.51 Hz

Std. Dev. @ 70

3.88 dB

4.13 dB

Std. Dev. @ 80

3.47 dB

4.13 dB

Std. Dev. @ Max

3.45 dB

4.66 dB

Max

90.0 dB SPL

93.8 dB SPL

Dynamic Range Compression

4.41 dB

4.40 dB

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Distortion

7.2

6.9

Total Harmonic Distortion

Weighted THD @ 80

0.481

0.127

Weighted THD @ Max

1.285

0.962

IMD @ 80

0.64%

0.52%

IMD @ Max

2.27%

6.85%

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Smart Features

Interface

8.5

8.0

Smart TV Picture

Smart OS

Tizen

Roku TV

Version

2021

10.0.2

Ease of Use

Easy

Smoothness

Very Smooth

Time Taken to Select YouTube

2 s

4 s

Time Taken to Change Backlight

5 s

4 s

Advanced Options

Many

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Ad-Free

0.0

Ads Picture

Yes

Opt-out

Opt-out of Suggested Content

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Apps and Features

8.5

8.0

Apps Picture

App Selection

Great

App Smoothness

Very Smooth

Average

Cast Capable

Yes

USB Drive Playback

Yes

USB Drive HDR Playback

Yes

HDR in Netflix

Yes

HDR in YouTube

Yes

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Remote

8.5

7.0

Remote Picture

Size

Small

Medium

Voice Control

Many Features

Search, Some Other Features

CEC Menu Control

Yes

Other Smart Features

Yes

Remote App

Samsung SmartThings

Roku

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TV Controls

Controls Picture

Show text

In The Box

In The Box Picture

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Misc

Power Consumption

156 W

130 W

Power Consumption (Max)

331 W

290 W

Firmware

1012

10.0.2 build 4264-AH

Check Price

65"

QN65QN900AFXZA

65"

65R648

75"

QN75QN900AFXZA

75"

75R648

85"

QN85QN900AFXZA