Between the QM6K 65 and QM851 Mini LED 75, the QM6K 65 comes out ahead in several specs, while the QM851 Mini LED 75 wins on peak brightness / screen size. Overall, the QM6K 65 scores 66 and the QM851 Mini LED 75 scores 79.6 on our Mars Score.
Which should you buy?
The QM851 Mini LED 75 is the clear pick on raw spec strength, leading by 13.6 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
The QM6K 65 does not 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 do not 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 - QM6K 65 wins
- No decisive advantages.
Why TCL - QM851 Mini LED 75 wins
- ▲Peak brightness — 177.78% more. 5000 nits vs 1800 nits.
- ▲Screen size — 15.38% more. 75 " vs 65 ".
Spec comparison
Display
| Spec | TCL - QM6K 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ⓘ | 1800 nits | 5000 nitslead |
HDR & Smart
| Spec | TCL - QM6K 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 - QM6K 65 | TCL - QM851 Mini LED 75 |
|---|---|---|
| HDMI 2.1 portsⓘ | 2 | 2 |
| VRRⓘ | true | true |
| ALLM | true | true |
Frequently asked
Which is brighter, QM6K 65 or QM851 Mini LED 75?+
QM851 Mini LED 75 peaks at 5000 nits vs 1800 nits.
Which is better for gaming, QM6K 65 or QM851 Mini LED 75?+
QM6K 65 offers 144Hz refresh and 2 HDMI 2.1 ports.
Does QM6K 65 or QM851 Mini LED 75 support Dolby Vision?+
Both support Dolby Vision.
Spec-level deep dives
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