Comparison between TCL 55S421 vs TCL 55S446

General Info
Model Number	TCL 55S421	TCL 55S446

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Type	TV	TV
Year	2018	2021
Brand	TCL	TCL
Model Series	S421	S446
Model Number	55S421	55S446
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	IPS-ADS
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	91.16 %	92.56 %
Backlight Source	Direct LED	Direct LED
Screen Brightness		300 cd/m²
Static Screen Contrast		1000 : 1
Screen Horizontal Viewing Angle	178 °	178 °
Screen Vertical Viewing Angle	178 °	178 °
Display Coating		Glossy
HDR	HDR10	HDR10 HLG (Hybrid Log Gamma)
3D	No	No
Size, weight, color
Case Depth	3 in 7.6 cm 76.2 mm 0.25 ft	3.3 in 8.4 cm 83.9 mm 0.28 ft
Case Weight	13.4 kg 29 lbs	11.2 kg 25 lbs
Case Width with Stand	49.1 in 124.7 cm 1247.1 mm 4.09 ft	48.7 in 123.7 cm 1237 mm 4.06 ft
Case Height with Stand	30.8 in 78.2 cm 782.3 mm 2.57 ft	30.4 in 77.2 cm 772.2 mm 2.53 ft
Case Depth with Stand	8.7 in 22.1 cm 221 mm 0.73 ft	11.81 in 30 cm 300 mm 0.98 ft
Case Weight with Stand	13.6 kg 30 lbs	11.3 kg 25 lbs
Case Color	Black	Black
Hardware
CPU Cores	2
GPU Cores	2
TV Tuner	Analog (NTSC/PAL/SECAM) Clear QAM ATSC	Analog (NTSC/PAL/SECAM) ATSC Clear QAM
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) Wi-Fi Direct
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 1 x Cable/Antenna In (F-type female) 1 x S/PDIF 1 x 3.5 mm Audio Out 1 x AV Composite In 3.5 mm jack 1 x USB 2.0 1 x Ethernet RJ45
Audio
Audio Speakers	2 x 8W	2 x 8W
Features
OS	Roku TV	Google TV
Cool Features	4K Creative Pro HDCP (High-bandwidth Digital Content Protection) 2.2	Disney+ Easy Voice Control Netflix YouTube Prime Video Google Assistant Alexa Chromecast built-in
Ergonomics
Case Width	49.1 in 124.7 cm 1247.1 mm 4.09 ft	48.7 in 123.7 cm 1237 mm 4.06 ft
Case Height	28.5 in 72.4 cm 723.9 mm 2.38 ft	28.3 in 71.9 cm 718.82 mm 2.36 ft
Vesa Mount Support	Yes	Yes
VESA Interface Standard Size	200 x 200	300 x 300
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	50 Hz / 60 Hz
Screen Interpolation Technology	Clear Motion Index	Natural Motion
Screen Interpolation Value	120	240
Screen Interpolation Measurement Unit	CMI	NM
Accessories
Extras	Remote control - RC282	Voice-Enabled Remote Control
Certificates and Standards
Licenses	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 55S421

TCL 55S446