Comparison between TCL 55S425 vs TCL 55S421

General Info
Model Number	TCL 55S425	TCL 55S421

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Type	TV	TV
Year	2018	2018
Brand	TCL	TCL
Model Series	S425	S421
Model Number	55S425	55S421
Display
Screen Size Class	55" (inches)	55" (inches)
Diagonal Size	54.65 in 138.8 cm 1388 mm 4.55 ft	54.65 in 138.8 cm 1388 mm 4.55 ft
Screen Width	47.62 in 121 cm 1209.6 mm 3.97 ft	47.62 in 121 cm 1209.6 mm 3.97 ft
Screen Height	26.79 in 68 cm 680.4 mm 2.23 ft	26.79 in 68 cm 680.4 mm 2.23 ft
Display Type	VA	VA
Display Bit Depth	10 bits (8 bits + FRC)	10 bits (8 bits + FRC)
Frame Rate Control	Yes	Yes
Max Number of Colors	1073741824	1073741824
Bits	30	30
Screen Aspect Ratio	16:9	16:9
Screen Resolution	3840 x 2160	3840 x 2160
Screen Pixel Pitch	0.315 mm	0.315 mm
Screen Pixel Density	80 ppi	80 ppi
Screen-to-Body Ratio	91.66 %	91.16 %
Backlight Source	Direct LED	Direct LED
Screen Horizontal Viewing Angle	178 °	178 °
Screen Vertical Viewing Angle	178 °	178 °
HDR	HDR10	HDR10
3D	No	No
Size, weight, color
Case Depth	3.1 in 7.9 cm 78.74 mm 0.26 ft	3 in 7.6 cm 76.2 mm 0.25 ft
Case Weight	12.1 kg 27 lbs	13.4 kg 29 lbs
Case Width with Stand	49 in 124.5 cm 1244.6 mm 4.08 ft	49.1 in 124.7 cm 1247.1 mm 4.09 ft
Case Height with Stand	30.6 in 77.7 cm 777.2 mm 2.55 ft	30.8 in 78.2 cm 782.3 mm 2.57 ft
Case Depth with Stand	7.99 in 20.3 cm 203 mm 0.67 ft	8.7 in 22.1 cm 221 mm 0.73 ft
Case Weight with Stand	12.3 kg 27 lbs	13.6 kg 30 lbs
Case Color	Black	Black
Hardware
CPU Cores	2	2
GPU Cores	2	2
TV Tuner	Analog (NTSC/PAL/SECAM) Clear QAM ATSC	Analog (NTSC/PAL/SECAM) Clear QAM ATSC
Built-in Camera	No	No
Network	LAN Wi-Fi 802.11a (IEEE 802.11a-1999) 802.11b (IEEE 802.11b-1999) 802.11g (IEEE 802.11g-2003) 802.11n (IEEE 802.11n-2009) 802.11n 5GHz 802.11ac (IEEE 802.11ac)	LAN Wi-Fi 802.11a (IEEE 802.11a-1999) 802.11b (IEEE 802.11b-1999) 802.11g (IEEE 802.11g-2003) 802.11n (IEEE 802.11n-2009) 802.11n 5GHz 802.11ac (IEEE 802.11ac)
Connectivity	3 x HDMI 2.0 (ARC; CEC) 1 x Satellite In (Main; F-type female) 1 x S/PDIF 1 x 3.5 mm Audio Out 1 x AV Composite In (Video + L/R) 1 x USB 2.0 (max 0.5 A) 1 x Ethernet RJ45	3 x HDMI 2.0 (ARC; CEC) 1 x Satellite In (Main; F-type female) 1 x S/PDIF 1 x 3.5 mm Audio Out 1 x AV Composite In (Video + L/R) 1 x USB 2.0 (max 0.5 A) 1 x Ethernet RJ45
Audio
Audio Speakers	2 x 8W	2 x 8W
Features
OS	Roku TV	Roku TV
Cool Features	4K Creative Pro HDCP (High-bandwidth Digital Content Protection) 2.2	4K Creative Pro HDCP (High-bandwidth Digital Content Protection) 2.2
Ergonomics
Case Width	49 in 124.5 cm 1244.6 mm 4.08 ft	49.1 in 124.7 cm 1247.1 mm 4.09 ft
Case Height	28.4 in 72.1 cm 721.4 mm 2.37 ft	28.5 in 72.4 cm 723.9 mm 2.38 ft
Vesa Mount Support	Yes	Yes
VESA Interface Standard Size	200 x 200	200 x 200
Removable VESA Stand	Yes	Yes
Height Adjustment	No	No
Landscape or Portrait Pivot Support	No	No
Left or Right Swivel Support	No	No
Forward and Backward Tilt Support	No	No
Frequency and Interpolation
Vertical Digital Frequency	60 Hz	60 Hz
Screen Interpolation Technology	Clear Motion Index	Clear Motion Index
Screen Interpolation Value	120	120
Screen Interpolation Measurement Unit	CMI	CMI
Accessories
Extras	Remote control - RC280	Remote control - RC282
Certificates and Standards
Licenses	RoHS	RoHS
Usage and Storage Requirements
Safe Operating Temperature Level	5 °C - 35 °C 41 °F - 95 °F	5 °C - 35 °C 41 °F - 95 °F
Safe Operating Humidity Level	20 % - 80 %	20 % - 80 %
Internal Storage Temperature	-15 °C - 45 °C 5 °F - 113 °F	-15 °C - 45 °C 5 °F - 113 °F
Internal Storage Humidity	10 % - 90 %	10 % - 90 %

TCL 55S425

TCL 55S421