Comparison between Dell Alienware AW5520QF vs Dell U4021QW

General Info
Model Number	Dell Alienware AW5520QF	Dell U4021QW

Price	Check on Amazon	Check on Amazon
Type	Monitor	Monitor
Year	2019	2021
Brand	Dell	Dell
Model Number	Alienware AW5520QF	U4021QW
Display
Screen Size Class	55" (inches)	40" (inches)
Diagonal Size	54.64 in 138.8 cm 1387.8 mm 4.55 ft
Screen Width	47.62 in 121 cm 1209.6 mm 3.97 ft	37.27 in 94.7 cm 946.6 mm 3.11 ft
Screen Height	26.79 in 68 cm 680.4 mm 2.23 ft
Display Curvature		2500
Display Type	OLED	IPS
Display Bit Depth	10 bits	10 bits
Frame Rate Control	No
Max Number of Colors	1073741824	1073741824
Bits	30	30
Screen Aspect Ratio	16:9	21:9
Screen Resolution	3840 x 2160	5120 x 2160
Screen Pixel Pitch	0.315 mm
Screen Pixel Density	80 ppi
Screen-to-Body Ratio	93.61 %
Backlight Source		W-LED
DCI P3	98.5%	98%
sRGB		100 %
Screen Brightness	130 cd/m²	300 cd/m²
Max Screen Brightness	400 cd/m²
Static Screen Contrast	130000 : 1	1000 : 1
Screen Horizontal Viewing Angle	120 °	178 °
Screen Vertical Viewing Angle	120 °	178 °
Display Minimum Response Time	0.5 ms	5 ms
Display Average Response Time		8 ms
Display Coating	Anti-glare/Matte (2H)	Anti-glare/Matte (3H)
3D	No	No
Size, weight, color
Case Depth	3.16 in 8 cm 80.3 mm 0.26 ft
Case Weight	25.5 kg 56 lbs
Case Width with Stand	48.26 in 122.6 cm 1225.9 mm 4.02 ft	37.27 in 94.7 cm 946.6 mm 3.11 ft
Case Height with Stand	30.34 in 77.1 cm 770.6 mm 2.53 ft	18.02 in 45.8 cm 457.8 mm 1.5 ft
Case Depth with Stand	10.39 in 26.4 cm 263.91 mm 0.87 ft	9.76 in 24.8 cm 248 mm 0.81 ft
Case Weight with Stand	26.1 kg 57 lbs	9.5 kg 21 lbs
Case Color	Black, Silver	Black
Hardware
Built-in Camera	No	No
Connectivity	1 x USB 3.0 (downstream; BC 1.2) 3 x HDMI 2.0 1 x S/PDIF 1 x 3.5 mm Audio Out 1 x DisplayPort 1.4 3 x USB 3.0 (downstream) 1 x USB 3.0 (upstream)	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)
Audio
Audio Speakers	2 x 14W	2 x 9W
Features
Cool Features	AMD FreeSync technology	KVM Switch Low Blue Light Picture-in-Picture Picture-by-Picture ComfortView Plus Flicker-free technology
Extra Features		Security lock slot
Ergonomics
Case Width	48.26 in 122.6 cm 1225.9 mm 4.02 ft
Case Height	28.24 in 71.7 cm 717.2 mm 2.35 ft
Vesa Mount Support	Yes	Yes
VESA Interface Standard Size	200 x 200	100 x 100
Removable VESA Stand	Yes	Yes
Height Adjustment	No	Yes
Height Adjustment Range		120 mm 12 cm 4.7244 in 0.3937 ft
Landscape or Portrait Pivot Support	No	No
Left or Right Swivel Support	No	Yes
Left Swivel		30 °
Right Swivel		30 °
Forward and Backward Tilt Support	No	Yes
Forward Tilt		5 °
Backward Tilt		21 °
Frequency and Interpolation
Vertical Digital Frequency	40 Hz - 120 Hz	60 Hz
Horizontal Digital Frequency	27 kHz - 269 kHz
Screen Interpolation Measurement Unit		NULL
Accessories
Extras	DisplatPort cable HDMI cable USB 3.0 cable VESA adapter	DisplayPort cable HDMI cable Thunderbolt 4 (USB-C) Active Cable USB Type-A to Type-B cable
Certificates and Standards
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 Alienware AW5520QF

Dell U4021QW