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TCL 55R646-CA
Rs.82,740.67

LG 55SM8100PVA
Rs.82,391.18
Model No 55R646-CA 55SM8100PVA
TV Type Smart TV Smart TV
Screen Size 55 Inch (139 cm) 55 Inch (139 cm)
Resolution 4K 3840 x 2160 4K 3840 x 2160
Aspect Ratio 16:9 16:9
Motion Rate 120 Hz 50 Hz
Viewing Angle 178°/178° 178°/178°
USB
USB Version : 2.0
Supported Audio Formats : MP3, AC3, AAC, AC4
Supported Video Formats : AVI, DIV, MPEG-4, MPEG-H, MP4, VC-1, VP8, PP9
Supported Picture Formats : JPEG, PNG ,BMP, HEIF
USB Version : 2.0
Supported Audio Formats : MP3, AC4, AC3, EAC3, AAC, MP2, PCM, WMA
Supported Video Formats : MKV, DivX, MP4, AVI, ASF, MOV, FLV
Supported Picture Formats : JPEG, JPS, MPO
Video
Backlight : 4K HDR Mini-LED QLED TV
HDR10+ : Yes
HDR10 : Yes
HLG : Yes
Dolby Vision : Yes
Natural Motion : 480
Resolution : UHD
Display Colors : 1.07 Billion
Picture Engine : AiPQ Engine
Backlight : 4K UHD Edge LED
IPS Panel : Yes
Ultra Luminance : Yes
Biliion Rich Color : Yes
Nano Cell Display : Yes
Noise Reduction : NR
BLU Type : Edge
2K HFR : Yes / Yes
Display Type : Super UHD
Upscaler : 4K Upscaler
HDR Effect : Yes ( 4K / 2K )
HDR : 4K Active HDR
Video Decoder VP9 : 4K@60P, 10Bit
Video Decoder HEVC : 4K@60P, 10Bit
Dimming : Local Dimming
Wide Color Gamut : Nano Cell Color
Viewing Angle : Wide Viewing Angle
Color Accuracy : True Color Accuracy
Color Enhancer : Advanced Color Enhancer
HDR10 Pro : Yes / Yes / Yes / Yes ( 4K / 2K )
HLG : Yes / Yes / Yes / Yes ( 4K / 2K )
Dynamic Tone Mapping : HDR Dynamic Tone Mapping
Picture Mode : Yes 9 Modes ( Vivid, Standard, Eco, Cinema, Sports, Game, HDR Effect, ( ISF ) Expert ( Bright Room ), ( ISF ) Expert ( Dark Room ))
Audio
Audio Output ( RMS ) : 15 W + 15 W
Dolby Processing : Dolby Atmos
Audio Passthrough : Dolby Atmos / Dolby Digital Plus / Dolby Digital
Audio Output ( RMS ) : 20 W ( 10 W Per Channel )
DTS Decoder : Yes
Clear Voice III : Yes
DTS Virtual : X : Yes
LG Sound Sync : Yes
Adaptive Sound Control : Yes
Bluetooth Audio Playback : Yes
One Touch Sound Tuning : Yes
Auto Notification ( Bluetooth Easy Paring ) : Yes
Speaker System : 2.0 Channel
Speaker Direction : Down Firing
Surround Mode : DTS Virtual : X
Simultaneous Audio Output : Yes ( Optical Output Or HP Support Model )
Audio Codec : AC4, AC3 ( Dolby Digital ), EAC3, HE-AAC, AAC, MP2, MP3, PCM, DTS, DTS-HD, DTS Express, WMA, apt-X ( Refer To Manual )
Connectivity Options
HDMI 2.1 : 4 ( 2 Ports With HDMI 2.1 Supports Up To 4k/120Hz. 1 Port With eARC )
USB 2.0 : 2
Ethernet / LAN : 1 Yes
RF Input ( NTSC, ATSC ) : 1 Yes
Audio Output ( RCA ) : Yes
Audio Output Headphone : 1 Yes
SPDIF Digital Audio Optical : 1 Yes
WiFi 6 : 802.11b/g/n/ac/ax 2X2, 2.4 GHz & 5 GHz
AV Input : Composite Video + L&R Audio In ( Mini 3.5 mm Connector )
HDMI 2.0 : 4 ( 2 Side, 2 Rear )
USB 2.0 : 2 ( 1 Side, 1 Rear )
Bluetooth 5.0 : Yes
Simplink ( HDMI CEC ) : Yes
Ethernet / LAN : Yes Rear
Optical Digital Audio Out ( SPDIF ) : Yes Rear
Wi-Fi : 802.11ac
Audio Return Channel ( eARC / ARC ) : ARC HDMI 2
RF In : 2 ( Rear, RF / Sat )
Component : Yes ( Rear, Component in / AV in common )
Composite In ( AV ) : Yes ( Rear, Component in / AV in common )
Smart TV Features
Smart Platform : Google TV
Chromecast Built-In : Yes
Auto Game Mode ( ALLM ) : Yes
THX Certified Game Mode : Yes
Advanced PQ Setting With Mobile App : Yes
Hands-Free Voice Google Assistant Control : Yes
Variable Refresh Rate ( VRR ) : 48Hz - 120 Hz @ 4K
Easy Voice Control : Works With Siri, Alexa, And Hey Google
Operating System : WebOS Smart TV
CPU : Quad Core
DIAL : Yes
AI UX : Yes
ThinQ : Yes
AI Home : Yes
Hotel Mode : Yes
Wi-Fi TV On : Yes
360° VR Play : Yes
Music Player : Yes
Quick Access : Yes
Screen Share : Yes
Mobile TV On : Yes
Web Browser : Yes
Intelligent Edit : Yes
LG TV Plus App : Yes
Speech To Text : Yes
LG Voice Search : Yes
Smart ThinQ App : Yes
LG Content Store : Yes
Universal Control : Yes
Home Dashboard : Yes
Mobile Connectivity : Yes
AI Recommendation : Yes
Auto Device Detection : Yes
Network File Browser : Yes
Bluetooth Low Energy On : Yes
Intelligent Voice Recognition : Yes
Block Access To Harmful Site : Yes
Magic Remote Control : Built-In
Magic Link : Yes ( Iran, Syria, Sudan Excludes Youtube )
Other Features
Sleep Timer : Yes
Closed Caption : Yes
1 Year Limited Warranty : Yes
Parental Control ( V-Chip ) : Yes
Accessible Menu System ( CVAA ) : Yes
Control Buttons : One Button
Multilingual On-Screen-Display : English, Spanish, French
Tuner Type : ATSC / NTSC / Clear QAM
Live TV Pause From Antenna ( Up To 30 Minutes ) : Yes ( Compatible With USB Drive )
Design : Full View Edge-To-Edge Glass Design
Design : Premium Design
Time Shift : Yes
Analog DVR : Yes
EPG ( 8 days ) : Yes
Teletext Page : Yes
Subtitle [ DVB ] : Yes
Digital Recording : Yes
Audio Description : Yes
Analog TV Reception : Yes
Time Machine ( DVR ) : Yes
Teletext ( Top / Flof / List ) : Yes
Data Broadcasting ( Country Spec ) : Yes
Instant Game Response ( VRR / ALLM ) : - / Yes
Cable : DVB-C
Terrestrial : DVB-T2
Satellite : Yes DVB-S2 ( Except Iran )
VESA Wall Mount Model : Refer To Accessory Sheet
Digital TV Reception ( Terrestrial, Cable, Satellite ) : Yes DVB-T2/C/S2 ( IRAN : DVB-T2/C )
General Details
Power Supply (Voltage, Hz) : AC 100V-240V 50/60Hz
Annual Power Consumption : 258 kWh/Y
Power Consumption Standby : <0.5 W
Weight Without Stand : 19.18 Kg
Weight With Stand : 19.59 Kg
Packaging Weight : 25.80 Kg
VESA Walll Mount Pattern : 300 mm X 300 mm
Power Supply ( Voltage, Hz ) : AC 100~240V 50-60Hz
On-Mode Power Consumption : 95.0 W
Peak Luminance Ratio of On-Mode or Home-Mode : 139 W
Standby / Off-Mode Power Consumption : 0.24 W
Presence of Lead : Yes
Energy Saving Mode : Yes
Energy Efficiency Label : 3
Peak Luminance In Percentage : 76 %
Weight Without Stand : 17.2 Kg
Weight With Stand : 18.7 Kg
Illuminance Green Sensor : Yes ( White Sensor )
Supplied Accessories
Remote Control : Voice Enabled Remote Control RC902N
2 AAA Batteries : Yes
Screw Size : M6 X 20
Power Cord Type : Detachable
Warranty Info / Quick Start Guide (QSG) : Yes English
Remote Control : MR19
Batteries : AAA X 2EA
Power Cable : Yes ( TV Detached )

Compare TCL 55R646-CA with:

Compare LG 55SM8100PVA with:

Key Differences

TCL 55R646-CA and LG 55SM8100PVA differ in resolution (UHD vs 4K 3840 x 2160), which can affect overall clarity and sharpness of the display. Both TVs come in similar screen sizes, making them suitable for comparable viewing setups and room environments. Both TVs come with smart platforms that support popular streaming apps and voice control features. Audio output differs between the two (15 W + 15 W vs 20 W ( 10 W Per Channel )), which can influence overall sound clarity and loudness. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. From a practical standpoint, both options provide a reliable viewing experience for most users. TCL 55R646-CA and LG 55SM8100PVA offer different motion rates (120 Hz vs 50 Hz), which can impact smoothness during fast-moving scenes like sports and gaming. If you're comparing TCL 55R646-CA and LG 55SM8100PVA, both models come with modern features and are designed to deliver a solid viewing experience across different use cases.

Verdict: Both models offer good value, and the better option depends on your specific requirements and viewing preferences.