Comparison between Dell U4021QW vs Dell UltraSharp U3818DW

General Info
Model Number	Dell U4021QW	Dell UltraSharp U3818DW

Price	Check on Amazon	Check on Amazon
Type	Monitor	Monitor
Year	2021	2017
Brand	Dell	Dell
Model Number	U4021QW	UltraSharp U3818DW
Display
Screen Size Class	40" (inches)	38" (inches)
Diagonal Size		37.5 in 95.3 cm 952.5 mm 3.13 ft
Screen Width	37.27 in 94.7 cm 946.6 mm 3.11 ft	34.63 in 88 cm 879.67 mm 2.89 ft
Screen Height		14.43 in 36.7 cm 366.53 mm 1.2 ft
Display Curvature	2500	2300
Display Manufacturer		LG Display
Display Type	IPS	AH-IPS
Display Bit Depth	10 bits	10 bits
Frame Rate Control		No
Max Number of Colors	1073741824	1073741824
Bits	30	30
Screen Aspect Ratio	21:9
Screen Resolution	5120 x 2160	3840 x 1600
Screen Pixel Pitch		0.229 mm
Screen Pixel Density		111 ppi
Screen-to-Body Ratio		90.89 %
Backlight Source	W-LED	W-LED
DCI P3	98%	78.1%
sRGB	100 %	99 %
Screen Brightness	300 cd/m²	350 cd/m²
Static Screen Contrast	1000 : 1	1000 : 1
Screen Horizontal Viewing Angle	178 °	178 °
Screen Vertical Viewing Angle	178 °	178 °
Screen Input Lag		25 ms
Display Minimum Response Time	5 ms	5 ms
Display Average Response Time	8 ms	8 ms
Display Maximum Response Time		20 ms
Display Coating	Anti-glare/Matte (3H)	Anti-glare/Matte (3H)
3D	No	No
Size, weight, color
Case Depth		2.19 in 5.6 cm 55.5 mm 0.18 ft
Case Weight		9.05 kg 20 lbs
Case Width with Stand	37.27 in 94.7 cm 946.6 mm 3.11 ft	35.2 in 89.4 cm 894 mm 2.93 ft
Case Height with Stand	18.02 in 45.8 cm 457.8 mm 1.5 ft	17.01 in 43.2 cm 432 mm 1.42 ft
Case Depth with Stand	9.76 in 24.8 cm 248 mm 0.81 ft	8.91 in 22.6 cm 226.4 mm 0.74 ft
Case Weight with Stand	9.5 kg 21 lbs	12.14 kg 27 lbs
Case Color	Black	Black
Hardware
Built-in Camera	No	No
Connectivity	1 x USB 3.2 (Type-C; downstream; 15W) 1 x Ethernet RJ45 (Gigabit) 1 x DisplayPort 1.4 1 x 3.5 mm Audio Out (line-out for speakers) 1 x Thunderbolt 3.0 (Type-C; upstream; 90W; DP Alt Mode) 2 x HDMI 2.0 4 x USB 3.2 (Type-A; Gen 1; downstream) 1 x USB 3.2 (Type-B; Gen 1; upstream)	2 x USB 3.0 (upstream) 2 x HDMI 2.0 1 x 3.5 mm Audio Out 1 x DisplayPort 1.2 4 x USB 3.0 (downstream) 1 x USB 3.0 (Type-C)
Audio
Audio Speakers	2 x 9W	2 x 9W
Features
Cool Features	KVM Switch Low Blue Light Picture-in-Picture Picture-by-Picture ComfortView Plus Flicker-free technology	Picture-in-Picture HDCP (High-bandwidth Digital Content Protection) Picture-by-Picture
Extra Features	Security lock slot	Security lock slot
Ergonomics
Case Width		35.2 in 89.4 cm 894 mm 2.93 ft
Case Height		15.62 in 39.7 cm 396.8 mm 1.3 ft
Vesa Mount Support	Yes	Yes
VESA Interface Standard Size	100 x 100	100 x 100
Removable VESA Stand	Yes	Yes
Height Adjustment	Yes	Yes
Height Adjustment Range	120 mm 12 cm 4.7244 in 0.3937 ft	115 mm 11.5 cm 4.5276 in 0.3773 ft
Landscape or Portrait Pivot Support	No	No
Left or Right Swivel Support	Yes	Yes
Left Swivel	30 °	30 °
Right Swivel	30 °	30 °
Forward and Backward Tilt Support	Yes	Yes
Forward Tilt	5 °	5 °
Backward Tilt	21 °	21 °
Frequency and Interpolation
Vertical Digital Frequency	60 Hz	60 Hz
Screen Interpolation Measurement Unit	NULL
Accessories
Extras	DisplayPort cable HDMI cable Thunderbolt 4 (USB-C) Active Cable USB Type-A to Type-B cable	DisplayPort cable Factory Calibration Report HDMI cable USB 3.0 upstream cable USB Type-C cable
Certificates and Standards
Licenses		CECP CEL ENERGY STAR RoHS Compliant TCO Certified Displays
Usage and Storage Requirements
Safe Operating Temperature Level	0 °C - 40 °C 32 °F - 104 °F	0 °C - 40 °C 32 °F - 104 °F
Safe Operating Humidity Level	10 % - 80 %	10 % - 80 %
Internal Storage Temperature	-20 °C - 60 °C -4 °F - 140 °F	-20 °C - 60 °C -4 °F - 140 °F
Internal Storage Humidity	5 % - 90 %	5 % - 90 %
Max Operating Altitude	5000	5000
Max Storage Altitude	12192	12192

Dell U4021QW

Dell UltraSharp U3818DW