Between the C855 Mini LED 65 and QM851 Mini LED 75, the C855 Mini LED 65 comes out ahead in several specs, while the QM851 Mini LED 75 wins on peak brightness and screen size. Overall, the C855 Mini LED 65 scores 74.5 and the QM851 Mini LED 75 scores 79.6 on our Mars Score.
Which should you buy?
The QM851 Mini LED 75 edges ahead on the Mars Score (74.5 vs 79.6), but the 5.1-point gap is small enough that the right pick comes down to which spec advantages matter to you.
The C855 Mini LED 65 doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.
Pick the QM851 Mini LED 75 if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. Its strongest claims are peak brightness, screen size.
Both ship with comparable panel type, refresh rate, dolby vision, so those specs don't separate the two — focus on the differences below.
Bottom line: the QM851 Mini LED 75 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why TCL - C855 Mini LED 65 wins
- No decisive advantages.
Why TCL - QM851 Mini LED 75 wins
- ▲Peak brightness — 42.86% more. 5000 nits vs 3500 nits.
- ▲Screen size — 15.38% more. 75 " vs 65 ".
Spec comparison
Display
| Spec | TCL - C855 Mini LED 65 | TCL - QM851 Mini LED 75 |
|---|---|---|
| Screen sizeⓘ | 65 " | 75 "lead |
| Panel typeⓘ | Mini-LED | Mini-LED |
| Resolutionⓘ | 4K | 4K |
| Refresh rateⓘ | 144 Hz | 144 Hz |
| Peak brightnessⓘ | 3500 nits | 5000 nitslead |
HDR & Smart
| Spec | TCL - C855 Mini LED 65 | TCL - QM851 Mini LED 75 |
|---|---|---|
| Dolby Visionⓘ | true | true |
| HDR10+ⓘ | true | true |
| Smart OS | Google TV | Google TV |
| Dolby Atmosⓘ | true | true |
Gaming
| Spec | TCL - C855 Mini LED 65 | TCL - QM851 Mini LED 75 |
|---|---|---|
| HDMI 2.1 portsⓘ | 2 | 2 |
| VRRⓘ | true | true |
| ALLM | true | true |
Frequently asked
Which is brighter, C855 Mini LED 65 or QM851 Mini LED 75?+
QM851 Mini LED 75 peaks at 5000 nits vs 3500 nits.
Which is better for gaming, C855 Mini LED 65 or QM851 Mini LED 75?+
C855 Mini LED 65 offers 144Hz refresh and 2 HDMI 2.1 ports.
Does C855 Mini LED 65 or QM851 Mini LED 75 support Dolby Vision?+
Both support Dolby Vision.
Spec-level deep dives
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