Comparison between Dell U4021QW vs Dell S2721QS

General Info
Model Number	Dell U4021QW	Dell S2721QS

Price	Check on Amazon	Check on Amazon
Type	Monitor	Monitor
Year	2021	2020
Brand	Dell	Dell
Model Number	U4021QW	S2721QS
Display
Screen Size Class	40" (inches)	27" (inches)
Diagonal Size		26.96 in 68.5 cm 684.7 mm 2.25 ft
Screen Width	37.27 in 94.7 cm 946.6 mm 3.11 ft	23.49 in 59.7 cm 596.736 mm 1.96 ft
Screen Height		13.22 in 33.6 cm 335.664 mm 1.1 ft
Display Curvature	2500
Display Type	IPS	IPS
Display Bit Depth	10 bits	10 bits
Max Number of Colors	1073741824	1073741824
Bits	30	30
Screen Aspect Ratio	21:9	16:9
Screen Resolution	5120 x 2160	3840 x 2160
Screen Pixel Pitch		0.155 mm
Screen Pixel Density		163 ppi
Screen-to-Body Ratio		89.83 %
Backlight Source	W-LED	W-LED
DCI P3	98%
sRGB	100 %	99 %
Screen Brightness	300 cd/m²	350 cd/m²
Max Screen Brightness		390 cd/m²
Static Screen Contrast	1000 : 1	1300 : 1
Screen Horizontal Viewing Angle	178 °	178 °
Screen Vertical Viewing Angle	178 °	178 °
Display Minimum Response Time	5 ms	4 ms
Display Average Response Time	8 ms	8 ms
Display Coating	Anti-glare/Matte (3H)	Anti-glare/Matte (3H)
3D	No	No
Size, weight, color
Case Depth		2.18 in 5.5 cm 55.4 mm 0.18 ft
Case Weight		4.7 kg 10 lbs
Case Width with Stand	37.27 in 94.7 cm 946.6 mm 3.11 ft	24.08 in 61.2 cm 611.6 mm 2.01 ft
Case Height with Stand	18.02 in 45.8 cm 457.8 mm 1.5 ft	15.75 in 40 cm 400.1 mm 1.31 ft
Case Depth with Stand	9.76 in 24.8 cm 248 mm 0.81 ft	6.88 in 17.5 cm 174.7 mm 0.57 ft
Case Weight with Stand	9.5 kg 21 lbs	6.4 kg 14 lbs
Case Color	Black	Silver
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)	1 x 3.5 mm Audio Out 2 x HDMI 2.0 1 x DisplayPort 1.2
Audio
Audio Speakers	2 x 9W	2 x 3W
Features
Cool Features	KVM Switch Low Blue Light Picture-in-Picture Picture-by-Picture ComfortView Plus Flicker-free technology	Flicker-free technology Low Blue Light 3-sided bezeless design AMD FreeSync technology
Extra Features	Security lock slot	Anti-theft stand lock slot - Kensington
Ergonomics
Case Width		24.08 in 61.2 cm 611.6 mm 2.01 ft
Case Height		14.35 in 36.5 cm 364.6 mm 1.2 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	110 mm 11 cm 4.3307 in 0.3609 ft
Landscape or Portrait Pivot Support	No	Yes
Left Pivot		90 °
Right Pivot		90 °
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	40 Hz - 60 Hz
Horizontal Digital Frequency		130 kHz - 137 kHz
Screen Interpolation Measurement Unit	NULL	NULL
Accessories
Extras	DisplayPort cable HDMI cable Thunderbolt 4 (USB-C) Active Cable USB Type-A to Type-B cable	HDMI cable
Certificates and Standards
Licenses		ENERGY STAR 8.0 EPEAT RoHS TCO Certified TUV Flicker Free TUV Low Blue Light
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 S2721QS