Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | TCL - QM7K Mini-LED 75 | TCL - C855 Mini LED 65 |
|---|---|---|
| Screen size | 75 " | 65 " |
| HDMI 2.1 ports | 4 | 2 |
Between the QM7K Mini-LED 75 and C855 Mini LED 65, the QM7K Mini-LED 75 comes out ahead in screen size / hdmi 2.1 ports, while the C855 Mini LED 65 wins on several specs. Overall, the QM7K Mini-LED 75 scores 76.4 and the C855 Mini LED 65 scores 74.3 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (76.4 vs 74.3). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the QM7K 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. The biggest gaps in its favor are screen size, hdmi 2.1 ports. The single most decisive one: Screen size — 15.38% more. 75 " vs 65 ".
The C855 Mini LED 65 similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable panel type, refresh rate, peak brightness, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: TCL - QM7K Mini-LED 75 or TCL - C855 Mini LED 65?
TCL - QM7K Mini-LED 75 leads the current Mars Score by 2.1 points.The more useful decision is the trade-off behind that result: compare screen size, hdmi 2.1 ports against the way you will actually use the product.
Choose TCL - QM7K Mini-LED 75 if…
TCL - QM7K Mini-LED 75 has the measurable edge on screen size in, hdmi 2 1 count.
Choose TCL - C855 Mini LED 65 if…
TCL - C855 Mini LED 65 does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why TCL - QM7K Mini-LED 75 wins
- ▲Screen size — 15.38% more. 75 " vs 65 ".
- ▲HDMI 2.1 ports — 2.00 more. 4 vs 2.
Why TCL - C855 Mini LED 65 wins
- No decisive advantages.
Spec comparison
Display
| Spec | TCL - QM7K Mini-LED 75 | TCL - C855 Mini LED 65 |
|---|---|---|
| Screen size | 75 "lead | 65 " |
| Panel typeⓘ | Mini-LED | Mini-LED |
| Resolutionⓘ | 4K | 4K |
| Refresh rateⓘ | 144 Hz | 144 Hz |
| Peak brightnessⓘ | 3500 nits | 3500 nits |
HDR & Smart
| Spec | TCL - QM7K Mini-LED 75 | TCL - C855 Mini LED 65 |
|---|---|---|
| Dolby Visionⓘ | true | true |
| HDR10+ⓘ | true | true |
| Smart OS | Google TV | Google TV |
| Dolby Atmosⓘ | true | true |
Gaming
| Spec | TCL - QM7K Mini-LED 75 | TCL - C855 Mini LED 65 |
|---|---|---|
| HDMI 2.1 portsⓘ | 4lead | 2 |
| VRRⓘ | true | true |
| ALLM | true | true |
Frequently asked
Which is brighter, QM7K Mini-LED 75 or C855 Mini LED 65?+
C855 Mini LED 65 peaks at 3500 nits vs 3500 nits.
Which is better for gaming, QM7K Mini-LED 75 or C855 Mini LED 65?+
QM7K Mini-LED 75 offers 144Hz refresh and 4 HDMI 2.1 ports.
Does QM7K Mini-LED 75 or C855 Mini LED 65 support Dolby Vision?+
Both support Dolby Vision.