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  1. Table of Contents
  2. Top
  3. Main Differences
  4. Design
    1. Style
    2. Stand
    3. Ergonomics
    4. Back
    5. Borders
    6. Thickness
    7. Build Quality
  5. Picture Quality
    1. Contrast
    2. Local Dimming
    3. SDR Peak Brightness
    4. HDR Peak Brightness
    5. Horizontal Viewing Angle
    6. Vertical Viewing Angle
    7. Gray Uniformity
    8. Black Uniformity
    9. Pre Calibration
    10. Post Calibration
    11. SDR Color Gamut
    12. SDR Color Volume
    13. HDR Color Gamut
    14. HDR Color Volume
    15. Image Retention
    16. Gradient
    17. Color Bleed
    18. Reflections
    19. Text Clarity
  6. Motion
    1. Response Time @ Max Refresh Rate
    2. Response Time @ 60Hz
    3. Image Flicker
    4. Black Frame Insertion (BFI)
    5. Refresh Rate
  7. Inputs
    1. Input Lag
    2. Resolution And Size
    3. Inputs
    4. Total Inputs
  8. Features
    1. Additional Features
    2. On-Screen Display (OSD)
    3. Controls
    4. In The Box
  9. Comments

Dell U2415 vs Dell U2518D

Side-by-Side Comparison

Products

Dell U2415
Dell U2518D

Tested using Methodology v1.0

Updated May 29, 2023 03:07 PM

SEE PRICE
Amazon.com

Tested using Methodology v1.1

Updated Sep 03, 2021 02:17 AM

SEE PRICE
Amazon.com
Dell U2415 Picture
Dell U2518D Picture

Variants

  • U2415 (24")
  • U2518D (25")

Our Verdict

Dell U2415

Dell U2518D

The Dell U2518D is better than the Dell U2415. The U2518D supports HDR and has a much better resolution that can display more detail on the screen. The U2518D also has a faster response time and can handle fast action with less blur. On the other hand, the U2415 has a lower input lag, and this is great news for gamers.

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Main Differences for
Mixed Usage

Threshold 

0.10

Mixed Usage 

7.4
7.6

Vertical Viewing Angle 
 

8.2
6.6

Resolution and Size 
 

7.3
8.3

Full Comparison

Design

Style  

Design Picture  

Dell U2415 Design Picture
Dell U2518D Design Picture

Size  

24"
25"

Curved  

No
No

Curve Radius  

N/A
Not Curved

Weight (without stand) 
 

7.9 lbs (3.6 kg)
7.7 lbs (3.5 kg)

Weight (with stand) 
 

12.8 lbs (5.8 kg)
12.8 lbs (5.8 kg)
Show Text 

Stand  

Stand Picture  

Dell U2415 Stand Picture
Dell U2518D Stand Picture

Width 
 

9.6" (24.4 cm)
11.5" (29.2 cm)

Depth 
 

8.1" (20.6 cm)
7.9" (20.1 cm)
Show Text 

Ergonomics 
 

8.2
8.5

Ergonomics Picture  

Dell U2415 Ergonomics Picture
Dell U2518D Ergonomics Picture

Height Adjustment 
 

4.5" (11.4 cm)
5.1" (13.0 cm)

Switch Portrait/Landscape  

Yes
Yes, Both Ways

Swivel Range  

-45° to 45°
-30° to 30°

Tilt Range  

-22.5° to 5°
-22.5° to 2.5°
Show Text 

Back  

Back Picture  

Dell U2415 Back Picture
Dell U2518D Back Picture

Wall Mount  

VESA 100x100
VESA 100x100
Show Text 

Borders  

Borders Picture  

Dell U2415 Borders Picture
Dell U2518D Borders Picture

Borders 
 

0.2" (0.5 cm)
0.3" (0.8 cm)
Show Text 

Thickness  

Thickness Picture  

Dell U2415 Thickness Picture
Dell U2518D Thickness Picture

Thickness (with stand) 
 

5.8" (14.7 cm)
5.4" (13.7 cm)

Thickness (without stand) 
 

1.7" (4.3 cm)
2.0" (5.1 cm)
Show Text 

Build Quality 
 

7.5
7.5

Build Quality Picture  

Dell U2415 Build Quality Picture
Dell U2518D Build Quality Picture
Show Text 
Picture Quality

Contrast 
 

6.1
6.3

Checkerboard Picture  

Dell U2415 Checkerboard Picture
Dell U2518D Checkerboard Picture

LCD Type 
 

IPS
IPS

Native Contrast 
 

1,064 : 1
1,187 : 1

Contrast With Local Dimming 
 

N/A
N/A
Show Text 

Local Dimming 
 

0.0
0.0

Local Dimming Video  

Local Dimming Video  

Local Dimming 
 

No
No

Backlight 
 

Direct
Direct
Show Text 

SDR Peak Brightness 
 

7.0
8.2

SDR Real Scene 
 

257 cd/m²
406 cd/m²

SDR Peak 2% Window 
 

262 cd/m²
423 cd/m²

SDR Peak 10% Window 
 

275 cd/m²
426 cd/m²

SDR Peak 25% Window 
 

275 cd/m²
426 cd/m²

SDR Peak 50% Window 
 

275 cd/m²
426 cd/m²

SDR Peak 100% Window 
 

274 cd/m²
426 cd/m²

SDR Sustained 2% Window 
 

260 cd/m²
421 cd/m²

SDR Sustained 10% Window 
 

274 cd/m²
424 cd/m²

SDR Sustained 25% Window 
 

274 cd/m²
425 cd/m²

SDR Sustained 50% Window 
 

274 cd/m²
425 cd/m²

SDR Sustained 100% Window 
 

274 cd/m²
425 cd/m²

SDR ABL 
 

0.003
0.000
Show Text 

HDR Peak Brightness 
 

0.0
7.2

HDR Real Scene 
 

N/A
498 cd/m²

HDR Peak 2% Window 
 

N/A
476 cd/m²

HDR Peak 10% Window 
 

N/A
520 cd/m²

HDR Peak 25% Window 
 

N/A
545 cd/m²

HDR Peak 50% Window 
 

N/A
562 cd/m²

HDR Peak 100% Window 
 

N/A
584 cd/m²

HDR Sustained 2% Window 
 

N/A
279 cd/m²

HDR Sustained 10% Window 
 

N/A
304 cd/m²

HDR Sustained 25% Window 
 

N/A
317 cd/m²

HDR Sustained 50% Window 
 

N/A
328 cd/m²

HDR Sustained 100% Window 
 

N/A
340 cd/m²

HDR ABL 
 

N/A
0.012
Show Text 

Horizontal Viewing Angle 
 

7.2
8.2

Horizontal Viewing Angle Video  

Horizontal Chroma Graph  

Dell U2518D Horizontal Chroma Graph

Color Washout From Left 
 

44°

Color Washout From Right 
 

47°

Horizontal Color Shift Picture  

Dell U2415 Horizontal Color Shift Picture

Horizontal Hue Graph  

Dell U2518D Horizontal Hue Graph

Color Shift From Left 
 

42°
50°

Color Shift From Right 
 

34°
55°

Horizontal Brightness Picture  

Dell U2415 Horizontal Brightness Picture

Horizontal Black Level Picture  

Dell U2415 Horizontal Black Level Picture

Horizontal Lightness Graph  

Dell U2518D Horizontal Lightness Graph

Brightness Loss From Left 
 

48°
46°

Brightness Loss From Right 
 

42°
49°

Black Level Raise From Left 
 

75°
70°

Black Level Raise From Right 
 

75°
70°

Curve Radius  

N/A

Gamma Shift From Left 
 

45°

Gamma Shift From Right 
 

53°
Show Text 

Vertical Viewing Angle 
 

8.2
6.6

Vertical Viewing Angle Video  

Vertical Chroma Graph  

Dell U2518D Vertical Chroma Graph

Color Washout From Below 
 

34°

Color Washout From Above 
 

34°

Vertical Color Shift Picture  

Dell U2415 Vertical Color Shift Picture

Vertical Hue Graph  

Dell U2518D Vertical Hue Graph

Color Shift From Below 
 

25°
34°

Color Shift From Above 
 

30°
37°

Vertical Brightness Picture  

Dell U2415 Vertical Brightness Picture

Vertical Black Level Picture  

Dell U2415 Vertical Black Level Picture

Vertical Lightness Graph  

Dell U2518D Vertical Lightness Graph

Brightness Loss From Below 
 

34°
39°

Brightness Loss From Above 
 

37°
39°

Black Level Raise From Below 
 

75°
23°

Black Level Raise From Above 
 

75°
52°

Gamma Shift From Below 
 

33°

Gamma Shift From Above 
 

34°
Show Text 

Gray Uniformity 
 

8.6
8.6

50% Uniformity Picture  

Dell U2415 50% Uniformity Picture
Dell U2518D 50% Uniformity Picture

50% Std. Dev. 
 

3.281%
3.180%

50% DSE 
 

0.109%
0.109%

5% Uniformity Picture  

Dell U2415 5% Uniformity Picture
Dell U2518D 5% Uniformity Picture

5% Std. Dev. 
 

0.463%
0.340%

5% DSE 
 

0.046%
0.046%
Show Text 

Black Uniformity 
 

4.5
5.9

Native Black Uniformity Picture  

Dell U2415 Native Black Uniformity Picture
Dell U2518D Native Black Uniformity Picture

Native Std. Dev. 
 

3.009%
2.053%

Black Uniformity Picture With Local Dimming  

Dell U2415 Black Uniformity Picture With Local Dimming
Dell U2518D Black Uniformity Picture With Local Dimming

Std. Dev. w/ L.D. 
 

N/A
N/A
Show Text 

Pre Calibration 
 

7.8
9.2

Pre Calibration Picture  

Dell U2415 Pre Calibration Picture
Dell U2518D Pre Calibration Picture

Pre Gamma Curve Picture  

Dell U2415 Pre Gamma Curve Picture
Dell U2518D Pre Gamma Curve Picture

Pre Color Picture  

Dell U2415 Pre Color Picture
Dell U2518D Pre Color Picture

Picture Mode 
 

Custom Color
Standard

Luminance 
 

230 cd/m²
275 cd/m²

Luminance Settings 
 

75
75

Contrast Setting 
 

75
75

RGB Controls 
 

100-100-100
100-100-100

Gamma Setting 
 

No Gamma Setting

Color Temperature 
 

6,161 K
6,720 K

White Balance dE 
 

2.73
1.28

Color dE 
 

2.84
1.15

Gamma 
 

2.16
2.19
Show Text 

Post Calibration 
 

9.5
9.7

Post Calibration Picture  

Dell U2415 Post Calibration Picture
Dell U2518D Post Calibration Picture

Post Gamma Curve Picture  

Dell U2415 Post Gamma Curve Picture
Dell U2518D Post Gamma Curve Picture

Post Color Picture  

Dell U2415 Post Color Picture
Dell U2518D Post Color Picture

Picture Mode 
 

Custom Color
Custom Color

Luminance 
 

101 cd/m²
99 cd/m²

Luminance Settings 
 

30
17

Contrast Setting 
 

75
75

RGB Controls 
 

96-99-100
99-98-100

Gamma Setting 
 

No Gamma Setting

Color Temperature 
 

6,482 K
6,513 K

White Balance dE 
 

0.81
0.45

Color dE 
 

0.45
0.48

Gamma 
 

2.18
2.18
Show Text 

SDR Color Gamut 
 

8.8
8.7

Color Gamut sRGB Picture  

Dell U2415 Color Gamut sRGB Picture
Dell U2518D Color Gamut sRGB Picture

sRGB xy 
 

98.6%
98.1%

Color Gamut ARGB Picture  

Dell U2415 Color Gamut ARGB Picture
Dell U2518D Color Gamut ARGB Picture

Adobe RGB xy 
 

76.9%
76.1%

sRGB Picture Mode 
 

Custom Color

Adobe RGB Picture Mode 
 

Custom Color
Show Text 

SDR Color Volume 
 

9.1
8.9

sRGB Color Volume ITP Picture  

Dell U2415 sRGB Color Volume ITP Picture
Dell U2518D sRGB Color Volume ITP Picture

sRGB In ICtCp 
 

98.1%
95.9%

Adobe RGB Color Volume ITP Picture  

Dell U2415 Adobe RGB Color Volume ITP Picture
Dell U2518D Adobe RGB Color Volume ITP Picture

Adobe RGB In ICtCp 
 

83.8%
80.8%

sRGB Picture Mode 
 

Custom Color

Adobe RGB Picture Mode 
 

Custom Color
Show Text 

HDR Color Gamut 
 

0.0
6.5

Wide Color Gamut 
 

No
No

Color Gamut DCI-P3 Picture  

Dell U2415 Color Gamut DCI-P3 Picture
Dell U2518D Color Gamut DCI-P3 Picture

DCI P3 xy 
 

N/A
72.6%

Color Gamut Rec.2020 Picture  

Dell U2415 Color Gamut Rec.2020 Picture
Dell U2518D Color Gamut Rec.2020 Picture

Rec. 2020 xy 
 

N/A
56.9%

DCI P3 Picture Mode 
 

Custom Color

Rec. 2020 Picture Mode 
 

Custom Color
Show Text 

HDR Color Volume 
 

0.0
5.9

P3 Color Volume ITP Picture  

Dell U2415 P3 Color Volume ITP Picture
Dell U2518D P3 Color Volume ITP Picture

DCI-P3 In ICtCp 
 

N/A
66.6%

2020 Color Volume ITP Picture  

Dell U2415 2020 Color Volume ITP Picture
Dell U2518D 2020 Color Volume ITP Picture

Rec. 2020 In ICtCp 
 

N/A
49.6%

DCI P3 Picture Mode 
 

Custom Color

Rec. 2020 Picture Mode 
 

Custom Color
Show Text 

Image Retention 
 

10
10

Image Retention Picture  

Dell U2415 Image Retention Picture
Dell U2518D Image Retention Picture

IR After 0 Min Recovery 
 

0.00%
0.00%

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%
Show Text 

Gradient 
 

8.4
9.4

Gradient Picture  

Dell U2415 Gradient Picture
Dell U2518D Gradient Picture

Color Depth 
 

8 Bit
10 Bit
Show Text 

Color Bleed 
 

10
10

Color Bleed Horizontal  

Dell U2415 Color Bleed Horizontal
Dell U2518D Color Bleed Horizontal

Pixel Row Error 
 

0.000%
0.000%

Color Bleed Vertical  

Dell U2415 Color Bleed Vertical
Dell U2518D Color Bleed Vertical

Pixel Column Error 
 

0.000%
0.001%
Show Text 

Reflections 
 

7.5
6.9

Average Room  

Dell U2415 Average Room
Dell U2518D Average Room

Average Room Off Picture  

Dell U2415 Average Room Off Picture
Dell U2518D Average Room Off Picture

Bright Room Off Picture  

Dell U2415 Bright Room Off Picture
Dell U2518D Bright Room Off Picture

Screen Finish 
 

Matte

Total Reflections 
 

6.3%

Indirect Reflections 
 

3.3%

Calculated Direct Reflections 
 

3.0%
Show Text 

Text Clarity 
 

8.0

ClearType On  

Dell U2518D ClearType On

Pixel Type 
 

IPS
IPS

ClearType Off  

Dell U2518D ClearType Off

Pixels  

Dell U2518D Pixels

Sub-Pixel Layout 
 

RGB
Motion

Response Time @ Max Refresh Rate 
 

8.4
7.7

Motion Blur Picture  

Dell U2415 Motion Blur Picture

Motion Blur Picture  

Dell U2518D Motion Blur Picture

Response Time Chart  

Dell U2415 Response Time Chart

Response Time Table  

Dell U2518D Response Time Table

Best Overdrive Setting 
 

Normal
Normal

Rise / Fall Time 
 

6.4 ms
8.0 ms

Total Response Time 
 

13.2 ms
15.5 ms

Overshoot Error 
 

1.7%

Dark Rise / Fall Time 
 

8.5 ms

Dark Total Response Time 
 

16.7 ms

Dark Overshoot Error 
 

3.2%
Show Text 

Response Time @ 60Hz 
 

7.7

Motion Blur Picture  

Dell U2518D Motion Blur Picture

Response Time Table  

Dell U2518D Response Time Table

Best Overdrive Setting 
 

Normal

Rise / Fall Time 
 

8.0 ms

Total Response Time 
 

15.5 ms

Overshoot Error 
 

1.7%

Dark Rise / Fall Time 
 

8.5 ms

Dark Total Response Time 
 

16.7 ms

Dark Overshoot Error 
 

3.2%

Image Flicker 
 

7.5
10

Backlight Picture  

Dell U2415 Backlight Picture
Dell U2518D Backlight Picture

Flicker-Free  

Yes
No

PWM Dimming Frequency 
 

0 Hz
940 Hz

Black Frame Insertion (BFI) 
 

No
No

BFI Picture  

Dell U2415 BFI Picture
Dell U2518D BFI Picture

BFI Frequency Picture  

Dell U2415 BFI Frequency Picture
Dell U2518D BFI Frequency Picture

BFI Maximum Frequency 
 

N/A
N/A

BFI Minimum Frequency 
 

N/A
N/A
Show Text 

Black Frame Insertion (BFI) 
 

0.0

Black Frame Insertion (BFI) 
 

No
No

BFI Picture  

Dell U2415 BFI Picture
Dell U2518D BFI Picture

BFI Frequency Picture  

Dell U2415 BFI Frequency Picture
Dell U2518D BFI Frequency Picture

BFI Maximum Frequency 
 

N/A
N/A

BFI Minimum Frequency 
 

N/A
N/A

Refresh Rate 
 

6.7
5.9

Variable Refresh Rate 
 

No
No VRR

Native 
 

60 Hz

Max Refresh Rate 
 

60 Hz
60 Hz

Factory Overclock 
 

N/A

Variable Refresh Rate 
 

No
No

FreeSync 
 

No

G-SYNC 
 

No
No

VRR Maximum 
 

N/A
N/A

VRR Minimum 
 

N/A
No VRR

VRR Maximum With OC 
 

N/A

VRR Supported Connectors  

N/A
No VRR
Show Text 
Inputs

Input Lag 
 

8.9
8.0

Native Resolution 
 

9.1 ms
15.8 ms

Non-Native Res @ Native Refresh 
 

9.1 ms

Native Resolution @ 60Hz 
 

9.1 ms
15.8 ms

Variable Refresh Rate 
 

N/A
N/A

Variable Refresh Rate @ 60Hz 
 

N/A

10 Bit HDR 
 

N/A
19.8 ms

Black Frame Insertion (BFI) 
 

N/A
N/A
Show Text 

Resolution And Size 
 

7.3
8.3

Native Resolution  

1920 x 1200
2560 x 1440

Aspect Ratio  

16:10
16:9

Megapixels  

2.3 MP
3.7 MP

Pixel Density 
 

94 PPI
118 PPI

Screen Diagonal  

24.0"
25.0"

Screen Area  

260 in²
266 in²
Show Text 

Inputs  

Inputs 1  

Dell U2415 Inputs 1
Dell U2518D Inputs 1

Inputs 2  

Dell U2415 Inputs 2
Dell U2518D Inputs 2

Total Inputs  

DisplayPort  

1 (DP 1.2)
1 (DP 1.2)

Mini DisplayPort  

1 (DP 1.2)
1 (DP 1.2)

HDMI  

2 (HDMI 1.4)
1 (HDMI 2.0)

DVI  

No
No

VGA  

No
No

DisplayPort Out  

1 (DP 1.2)
1 (DP 1.2)

USB  

5 (USB 3.0)
4 (USB 3.0)

USB C  

No
No

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  

Internal
Internal
Show Text 
Features

Additional Features 
 

RGB Illumination 
 

No

Speakers 
 

No
No

HDR10  

No
Yes

Multiple Input Display 
 

No
No
Show Text 

On-Screen Display (OSD)  

OSD Picture  

Dell U2415 OSD Picture
Dell U2518D OSD Picture

Controls  

Controls Picture  

Dell U2415 Controls Picture
Dell U2518D Controls Picture
Show Text 

In The Box  

In The Box Picture  

Dell U2415 In The Box Picture
Dell U2518D In The Box Picture
Show Text 

Check Price

Dell U2415

Dell U2518D

Comments

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Dell U2415 vs Dell U2518D: Main Discussion

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