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- Table of Contents
- Top
- Main Differences
- Design
- Picture Quality
- Motion
- Inputs
- Features
- Comments
LG 32UD99-W vs Samsung C34J791/CJ791
Side-by-Side Comparison
Products
LG 32UD99-W
Samsung C34J791/CJ791
Tested using Methodology v1.1
Updated May 29, 2023 03:07 PM
SEE PRICE
Amazon.comTested using Methodology v1.0
Updated Jul 31, 2024 03:34 PM
SEE PRICE
Amazon.com
Size32"
Pixel TypeIPS
Variable Refresh RateFreeSync
Native Resolution3840 x 2160
Max Refresh Rate60 Hz
Size34"
Pixel TypeVA
Variable Refresh RateFreeSync
Native Resolution3440 x 1440
Max Refresh Rate100 Hz
Variants
- 32UD99-W (32")
- C34J791 (34")
Our Verdict
LG 32UD99-W
Samsung C34J791/CJ791
The LG 32UD99-W is significantly better than the Samsung C34J791/CJ791 for most people in the majority of uses. The LG has better viewing angles, due to the IPS panel, better ergonomics, can get brighter, supports HDR, and has a 4k resolution. The Samsung CJ791 has a VA panel and slightly better blacks. It also has a faster refresh rate, a lower input lag, and a curve profile for those who like it.
Check Price
32"
32UD99-W
SEE PRICE
Amazon.com34"
C34J791
SEE PRICE
Amazon.com32"
32UD99-W
SEE PRICE
Walmart.com34"
C34J791
SEE PRICE
BestBuy.com32"
32UD99-W
SEARCH
B&H34"
C34J791
SEE PRICE
Walmart.com32"
32UD99-W
SEARCH
BestBuy.com34"
C34J791
SEARCH
B&H32"
32UD99-W
SEARCH
LG.com34"
C34J791
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Samsung.comNotice: 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
monitors test methodology.
Read more
Main Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
7.8
7.2
Vertical Viewing Angle
7.3
4.6
Horizontal Viewing Angle
7.9
4.8
Reflections
5.8
7.5
Ergonomics
6.2
4.7
Full Comparison
Design
Style
Design Picture
Size
32"
34"
Curved
No
Yes
Curve Radius
Not Curved
1500R
Weight (without stand)
14.3 lbs (6.5 kg)
15.0 lbs (6.8 kg)
Weight (with stand)
18.5 lbs (8.4 kg)
16.5 lbs (7.5 kg)
Stand
Stand Picture
Width
15.7" (39.9 cm)
9.6" (24.4 cm)
Depth
10.8" (27.4 cm)
12.2" (31.0 cm)
Ergonomics
6.2
4.7
Ergonomics Picture
Height Adjustment
4.3" (10.9 cm)
3.9" (9.9 cm)
Switch Portrait/Landscape
Yes, Clockwise
No
Swivel Range
No swivel
N/A
Tilt Range
-20° to 5°
-20° to 15°
Back
Back Picture
Wall Mount
VESA 100x100
VESA 100x100, VESA 200x200
Borders
Borders Picture
Borders
0.3" (0.8 cm)
0.4" (1.0 cm)
Thickness
Thickness Picture
Thickness (with stand)
7.3" (18.5 cm)
8.3" (21.1 cm)
Thickness (without stand)
1.7" (4.3 cm)
6.5" (16.5 cm)
Build Quality
6.5
8.0
Build Quality Picture
Picture Quality
Contrast
6.8
7.8
Checkerboard Picture
LCD Type
IPS
VA
Native Contrast
1,613 : 1
2,904 : 1
Contrast With Local Dimming
N/A
N/A
Local Dimming
0.0
0.0
Local Dimming Video
Local Dimming Video
Local Dimming
No
No
Backlight
Edge
Edge
SDR Peak Brightness
8.0
6.9
SDR Real Scene
352 cd/m²
251 cd/m²
SDR Peak 2% Window
364 cd/m²
248 cd/m²
SDR Peak 10% Window
364 cd/m²
249 cd/m²
SDR Peak 25% Window
364 cd/m²
249 cd/m²
SDR Peak 50% Window
364 cd/m²
248 cd/m²
SDR Peak 100% Window
363 cd/m²
248 cd/m²
SDR Sustained 2% Window
364 cd/m²
248 cd/m²
SDR Sustained 10% Window
364 cd/m²
249 cd/m²
SDR Sustained 25% Window
364 cd/m²
249 cd/m²
SDR Sustained 50% Window
364 cd/m²
248 cd/m²
SDR Sustained 100% Window
363 cd/m²
248 cd/m²
SDR ABL
0.000
0.000
HDR Peak Brightness
6.3
0.0
HDR Real Scene
312 cd/m²
N/A
HDR Peak 2% Window
415 cd/m²
N/A
HDR Peak 10% Window
394 cd/m²
N/A
HDR Peak 25% Window
414 cd/m²
N/A
HDR Peak 50% Window
403 cd/m²
N/A
HDR Peak 100% Window
528 cd/m²
N/A
HDR Sustained 2% Window
330 cd/m²
N/A
HDR Sustained 10% Window
331 cd/m²
N/A
HDR Sustained 25% Window
332 cd/m²
N/A
HDR Sustained 50% Window
332 cd/m²
N/A
HDR Sustained 100% Window
330 cd/m²
N/A
HDR ABL
0.000
N/A
Horizontal Viewing Angle
7.9
4.8
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
43°
Color Washout From Right
42°
Horizontal Color Shift Picture
Horizontal Hue Graph
Color Shift From Left
53°
31°
Color Shift From Right
55°
30°
Horizontal Brightness Picture
Horizontal Black Level Picture
Horizontal Lightness Graph
Brightness Loss From Left
46°
44°
Brightness Loss From Right
46°
40°
Black Level Raise From Left
70°
13°
Black Level Raise From Right
70°
13°
Curve Radius
1,500R
Gamma Shift From Left
42°
Gamma Shift From Right
42°
Vertical Viewing Angle
7.3
4.6
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
32°
Color Washout From Above
32°
Vertical Color Shift Picture
Vertical Hue Graph
Color Shift From Below
43°
26°
Color Shift From Above
48°
23°
Vertical Brightness Picture
Vertical Black Level Picture
Vertical Lightness Graph
Brightness Loss From Below
34°
37°
Brightness Loss From Above
35°
35°
Black Level Raise From Below
70°
6°
Black Level Raise From Above
70°
5°
Gamma Shift From Below
41°
Gamma Shift From Above
42°
Gray Uniformity
8.4
8.2
50% Uniformity Picture
50% Std. Dev.
3.675%
4.951%
50% DSE
0.119%
0.112%
5% Uniformity Picture
5% Std. Dev.
0.391%
0.915%
5% DSE
0.061%
0.059%
Black Uniformity
6.4
4.9
Native Black Uniformity Picture
Native Std. Dev.
1.696%
2.766%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Pre Calibration
7.0
7.3
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Photo
Custom
Luminance
361 cd/m²
117 cd/m²
Luminance Settings
18
53
Contrast Setting
70
75
RGB Controls
50-50-50
Cool 1
Gamma Setting
Mode 2
Color Temperature
6,680 K
6,879 K
White Balance dE
3.01
3.52
Color dE
3.82
2.78
Gamma
2.09
2.22
Post Calibration
9.6
9.5
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Custom
Custom
Luminance
98 cd/m²
100 cd/m²
Luminance Settings
18
39
Contrast Setting
70
100
RGB Controls
51-53-47
36-40-44
Gamma Setting
Mode 2
Color Temperature
6,543 K
6,466 K
White Balance dE
0.65
0.48
Color dE
0.51
0.71
Gamma
2.19
2.18
SDR Color Gamut
9.2
8.9
Color Gamut sRGB Picture
sRGB xy
99.5%
95.4%
Color Gamut ARGB Picture
Adobe RGB xy
83.5%
81.8%
sRGB Picture Mode
Custom
Adobe RGB Picture Mode
Photo
SDR Color Volume
9.3
9.5
sRGB Color Volume ITP Picture
sRGB In ICtCp
97.7%
99.2%
Adobe RGB Color Volume ITP Picture
Adobe RGB In ICtCp
88.0%
89.5%
sRGB Picture Mode
Custom
Adobe RGB Picture Mode
Photo
HDR Color Gamut
7.5
0.0
Wide Color Gamut
Yes
No
Color Gamut DCI-P3 Picture
DCI P3 xy
83.3%
N/A
Color Gamut Rec.2020 Picture
Rec. 2020 xy
66.4%
N/A
DCI P3 Picture Mode
HDR Standard
Rec. 2020 Picture Mode
HDR Standard
HDR Color Volume
6.7
0.0
P3 Color Volume ITP Picture
DCI-P3 In ICtCp
72.3%
N/A
2020 Color Volume ITP Picture
Rec. 2020 In ICtCp
60.8%
N/A
DCI P3 Picture Mode
HDR Standard
Rec. 2020 Picture Mode
HDR Standard
Image Retention
9.8
7.7
Image Retention Picture
IR After 0 Min Recovery
0.07%
0.14%
IR After 2 Min Recovery
0.00%
0.00%
IR After 4 Min Recovery
0.00%
0.00%
IR After 6 Min Recovery
0.00%
0.00%
IR After 8 Min Recovery
0.00%
0.00%
IR After 10 Min Recovery
0.00%
0.00%
Gradient
9.7
8.5
Gradient Picture
Color Depth
10 Bit
8 Bit
Color Bleed
10
10
Color Bleed Horizontal
Pixel Row Error
0.001%
0.001%
Color Bleed Vertical
Pixel Column Error
0.000%
0.001%
Reflections
5.8
7.5
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Total Reflections
8.4%
Indirect Reflections
4.1%
Calculated Direct Reflections
4.3%
Text Clarity
9.5
ClearType On
Pixel Type
IPS
VA
ClearType Off
Pixels
Sub-Pixel Layout
RGB
Motion
Response Time @ Max Refresh Rate
7.5
8.7
Motion Blur Picture
Motion Blur Picture
Response Time Chart
Response Time Table
Best Overdrive Setting
Normal
Fastest
Rise / Fall Time
7.9 ms
4.9 ms
Total Response Time
17.2 ms
14.0 ms
Overshoot Error
3.4%
Dark Rise / Fall Time
8.9 ms
Dark Total Response Time
15.8 ms
Dark Overshoot Error
2.3%
Response Time @ 60Hz
7.5
Motion Blur Picture
Response Time Table
Best Overdrive Setting
Normal
Rise / Fall Time
7.9 ms
Total Response Time
17.2 ms
Overshoot Error
3.4%
Dark Rise / Fall Time
8.9 ms
Dark Total Response Time
15.8 ms
Dark Overshoot Error
2.3%
Image Flicker
10
7.5
Backlight Picture
Flicker-Free
Yes
No
PWM Dimming Frequency
0 Hz
>1000 Hz
Black Frame Insertion (BFI)
No
No
BFI Picture
BFI Frequency Picture
BFI Maximum Frequency
N/A
N/A
BFI Minimum Frequency
N/A
N/A
Black Frame Insertion (BFI)
0.0
Black Frame Insertion (BFI)
No
No
BFI Picture
BFI Frequency Picture
BFI Maximum Frequency
N/A
N/A
BFI Minimum Frequency
N/A
N/A
Refresh Rate
7.4
8.8
Variable Refresh Rate
FreeSync
FreeSync
Native
60 Hz
Max Refresh Rate
60 Hz
100 Hz
Factory Overclock
N/A
Variable Refresh Rate
Yes
FreeSync
FreeSync
Yes
G-SYNC
Partially Compatible
Yes
VRR Maximum
60 Hz
100 Hz
VRR Minimum
40 Hz
< 20 Hz
VRR Maximum With OC
N/A
VRR Supported Connectors
DisplayPort, HDMI
DisplayPort, HDMI
Inputs
Input Lag
9.0
9.4
Native Resolution
8.9 ms
5.7 ms
Non-Native Res @ Native Refresh
5.8 ms
Native Resolution @ 60Hz
8.9 ms
9.1 ms
Variable Refresh Rate
9.4 ms
6.0 ms
Variable Refresh Rate @ 60Hz
9.4 ms
10 Bit HDR
9.0 ms
N/A
Black Frame Insertion (BFI)
N/A
N/A
Resolution And Size
9.2
8.9
Native Resolution
3840 x 2160
3440 x 1440
Aspect Ratio
16:9
21:9
Megapixels
8.3 MP
5.0 MP
Pixel Density
138 PPI
110 PPI
Screen Diagonal
31.7"
34.0"
Screen Area
432 in²
411 in²
Inputs
Inputs 1
Inputs 2
Total Inputs
DisplayPort
1 (DP 1.2)
1 (DP 1.2)
Mini DisplayPort
No
No
HDMI
2 (HDMI 2.0)
1 (HDMI 2.0)
DVI
No
No
VGA
No
No
DisplayPort Out
No
No
USB
2 (USB 3.0)
2 (USB 2.0)
USB C
1 (USB, USB PD, DP Alt Mode)
2 (Thunderbolt 3, USB, PD)
Analog Audio Out 3.5mm
1
1
Microphone In 3.5mm
No
No
Digital Optical Audio Out
No
No
Analog Audio Out RCA
No
No
Power Supply
External Brick
External Brick
Features
Additional Features
RGB Illumination
No
Speakers
Yes
Yes
HDR10
Yes
No
Multiple Input Display
PBP
PIP + PBP
On-Screen Display (OSD)
OSD Picture
Controls
Controls Picture
In The Box
In The Box Picture
Check Price
32"
32UD99-W
SEE PRICE
Amazon.com34"
C34J791
SEE PRICE
Amazon.com32"
32UD99-W
SEE PRICE
Walmart.com34"
C34J791
SEE PRICE
BestBuy.com32"
32UD99-W
SEARCH
B&H34"
C34J791
SEE PRICE
Walmart.com32"
32UD99-W
SEARCH
BestBuy.com34"
C34J791
SEARCH
B&H32"
32UD99-W
SEARCH
LG.com34"
C34J791
SEARCH
Samsung.com
LG 32UD99-W
Samsung C34J791/CJ791
Comments
LG 32UD99-W vs Samsung C34J791/CJ791: Main Discussion
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