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TCL QM851G 77" — Mini-LED · 77" · 2024
TCL

TCL QM851G 77"

Mini-LED · 77" · 2024

92
/ 100
From $3,749
VS
LG C3 OLED 77" — OLED evo · 77" · 2023
LG

LG C3 OLED 77"

OLED evo · 77" · 2023

92
/ 100
From $3,749
Specdex verdict

Dead heat — it comes down to priorities.

In our weighted Specdex score, TCL QM851G 77" lands at 92 and LG C3 OLED 77" at 92. With scores tied, the decision hinges on which sub-scores matter most to you.

Pick TCL QM851G 77" if…

  • ✓Strong HDR performance
  • ✓Current smart platform
  • ✓HDMI 2.1 on most HDMI ports

Pick LG C3 OLED 77" if…

  • ✓Strong HDR performance
  • ✓Current smart platform
  • ✓HDMI 2.1 on most HDMI ports
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Winner by scenario

Derived from the sub-score breakdown · not a separate test

Picture quality

Tie

Panel, processing, and HDR performance

Effectively tied — neither pulls a 2-point weighted lead.

Gaming

Tie

Input lag, VRR, 120 Hz support

Effectively tied — neither pulls a 2-point weighted lead.

Smart platform

Tie

OS speed, app support, ecosystem

Effectively tied — neither pulls a 2-point weighted lead.

Value for money

Tie

Specdex score per dollar at MSRP

Effectively tied — similar score-per-dollar at MSRP.

TCL QM851G 77" 92
vs
92 LG C3 OLED 77"

Score breakdown

TCL QM851G 77"
92
picture 92
motion 90
gaming 88
smart 82
sound 78
LG C3 OLED 77"
92
picture 92
motion 90
gaming 88
smart 82
sound 78

Specs side-by-side

TCL QM851G 77" versus LG C3 OLED 77" — full spec comparison
Spec TCL QM851G 77" LG C3 OLED 77"
Panel
Mini-LED
OLED evo
Size
77"
77"
Refresh
120Hz
120Hz
Release year
2024
2023

TCL QM851G 77"

Pros
  • +Strong HDR performance
  • +Current smart platform
  • +HDMI 2.1 on most HDMI ports
Cons
  • −Ads on smart platform
  • −Sound trails dedicated audio
  • −Large footprint

LG C3 OLED 77"

Pros
  • +Strong HDR performance
  • +Current smart platform
  • +HDMI 2.1 on most HDMI ports
Cons
  • −Ads on smart platform
  • −Sound trails dedicated audio
  • −Large footprint

FAQ: TCL QM851G 77" vs LG C3 OLED 77"

Which is better, TCL QM851G 77" or LG C3 OLED 77"? +

Both score 92 on our weighted rubric — tied. Your best pick depends on the sub-scores above.

Is TCL QM851G 77" worth the price? +

At $3,749, TCL QM851G 77" delivers a Specdex score of 92 — strongest in picture.

Is LG C3 OLED 77" worth the price? +

At $3,749, LG C3 OLED 77" delivers a Specdex score of 92 — strongest in picture.

Does TCL QM851G 77" or LG C3 OLED 77" last longer? +

Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.