Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | TCL - QM751 Mini LED 65 | Samsung - QN900F 8K 65 |
|---|---|---|
| Refresh rate | 120 Hz | 165 Hz |
| HDMI 2.1 ports | 2 | 4 |
| Dolby Vision | true | false |
| Smart OS | Google TV | Tizen |
Between the QM751 Mini LED 65 and QN900F 8K 65, the QM751 Mini LED 65 comes out ahead in dolby vision / smart os, while the QN900F 8K 65 wins on refresh rate / hdmi 2.1 ports. Overall, the QM751 Mini LED 65 scores 70.6 and the QN900F 8K 65 scores 74.1 on our Mars Score.
Which should you buy?
The QN900F 8K 65 edges ahead on the Mars Score (70.6 vs 74.1), but the 3.5-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the QM751 Mini LED 65 if you care most about dolby vision / smart os. The biggest gaps in its favor are dolby vision, smart os. The single most decisive one: Has Dolby Vision.
Pick the QN900F 8K 65 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 refresh rate, hdmi 2.1 ports. The single most decisive one: Refresh rate — 37.50% more. 165 Hz vs 120 Hz.
Both ship with comparable screen size, panel type, 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 - QM751 Mini LED 65 or Samsung - QN900F 8K 65?
Samsung - QN900F 8K 65 leads the current Mars Score by 3.5 points.The more useful decision is the trade-off behind that result: compare refresh rate, hdmi 2.1 ports against the way you will actually use the product.
Choose TCL - QM751 Mini LED 65 if…
TCL - QM751 Mini LED 65 has the measurable edge on has dolby vision, smart os.
Choose Samsung - QN900F 8K 65 if…
Samsung - QN900F 8K 65 has the measurable edge on refresh rate hz, hdmi 2 1 count.
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 - QM751 Mini LED 65 wins
- ▲Has Dolby Vision.
- ▲Smart OS: Google TV (vs Tizen).
Why Samsung - QN900F 8K 65 wins
- ▲Refresh rate — 37.50% more. 165 Hz vs 120 Hz.
- ▲HDMI 2.1 ports — 2.00 more. 4 vs 2.
Spec comparison
Display
| Spec | TCL - QM751 Mini LED 65 | Samsung - QN900F 8K 65 |
|---|---|---|
| Screen size | 65 " | 65 " |
| Panel typeⓘ | Mini-LED | Mini-LED |
| Resolutionⓘ | 4K | 8Klead |
| Refresh rateⓘ | 120 Hz | 165 Hzlead |
| Peak brightnessⓘ | 3000 nits | 3000 nits |
HDR & Smart
| Spec | TCL - QM751 Mini LED 65 | Samsung - QN900F 8K 65 |
|---|---|---|
| Dolby Visionⓘ | truelead | false |
| HDR10+ⓘ | true | true |
| Smart OS | Google TVlead | Tizen |
| Dolby Atmosⓘ | true | true |
Gaming
| Spec | TCL - QM751 Mini LED 65 | Samsung - QN900F 8K 65 |
|---|---|---|
| HDMI 2.1 portsⓘ | 2 | 4lead |
| VRRⓘ | true | true |
| ALLM | true | true |
Frequently asked
Which is brighter, QM751 Mini LED 65 or QN900F 8K 65?+
QN900F 8K 65 peaks at 3000 nits vs 3000 nits.
Which is better for gaming, QM751 Mini LED 65 or QN900F 8K 65?+
QN900F 8K 65 offers 165Hz refresh and 4 HDMI 2.1 ports.
Does QM751 Mini LED 65 or QN900F 8K 65 support Dolby Vision?+
QM751 Mini LED 65 supports Dolby Vision; QN900F 8K 65 does not.