Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | TCL - QM851 Mini LED 65 | Samsung - S95F QD-OLED 77 |
|---|---|---|
| Peak brightness | 5000 nits | 3800 nits |
| Screen size | 65 " | 77 " |
| Refresh rate | 144 Hz | 165 Hz |
| HDMI 2.1 ports | 2 | 4 |
| Dolby Vision | true | false |
| Smart OS | Google TV | Tizen |
Between the QM851 Mini LED 65 and S95F QD-OLED 77, the QM851 Mini LED 65 comes out ahead in peak brightness / dolby vision, while the S95F QD-OLED 77 wins on screen size / refresh rate. Overall, the QM851 Mini LED 65 scores 76.2 and the S95F QD-OLED 77 scores 84.8 on our Mars Score.
Which should you buy?
The S95F QD-OLED 77 is the clear pick on raw spec strength, leading by 8.6 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.
Pick the QM851 Mini LED 65 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 peak brightness, dolby vision, smart os. The single most decisive one: Peak brightness — 31.58% more. 5000 nits vs 3800 nits.
Pick the S95F QD-OLED 77 if you care most about screen size / refresh rate. Its strongest claims are screen size, refresh rate, hdmi 2.1 ports, among others. The single most decisive one: Screen size — 18.46% more. 77 " vs 65 ".
Both ship with comparable vrr, so those specs do not separate the two — focus on the differences below.
Bottom line: the S95F QD-OLED 77 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: TCL - QM851 Mini LED 65 or Samsung - S95F QD-OLED 77?
Samsung - S95F QD-OLED 77 leads the current Mars Score by 8.6 points.The more useful decision is the trade-off behind that result: compare screen size, panel type, refresh rate, hdmi 2.1 ports against the way you will actually use the product.
Choose TCL - QM851 Mini LED 65 if…
TCL - QM851 Mini LED 65 has the measurable edge on peak brightness nits, has dolby vision, smart os.
Choose Samsung - S95F QD-OLED 77 if…
Samsung - S95F QD-OLED 77 has the measurable edge on screen size in, 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 - QM851 Mini LED 65 wins
- ▲Peak brightness — 31.58% more. 5000 nits vs 3800 nits.
- ▲Has Dolby Vision.
- ▲Smart OS: Google TV (vs Tizen).
Why Samsung - S95F QD-OLED 77 wins
- ▲Screen size — 18.46% more. 77 " vs 65 ".
- ▲Refresh rate — 14.58% more. 165 Hz vs 144 Hz.
- ▲HDMI 2.1 ports — 2.00 more. 4 vs 2.
- ▲Panel type: QD-OLED (vs Mini-LED).
Spec comparison
Display
| Spec | TCL - QM851 Mini LED 65 | Samsung - S95F QD-OLED 77 |
|---|---|---|
| Screen size | 65 " | 77 "lead |
| Panel typeⓘ | Mini-LED | QD-OLEDlead |
| Resolutionⓘ | 4K | 4K |
| Refresh rateⓘ | 144 Hz | 165 Hzlead |
| Peak brightnessⓘ | 5000 nitslead | 3800 nits |
HDR & Smart
| Spec | TCL - QM851 Mini LED 65 | Samsung - S95F QD-OLED 77 |
|---|---|---|
| Dolby Visionⓘ | truelead | false |
| HDR10+ⓘ | true | true |
| Smart OS | Google TVlead | Tizen |
| Dolby Atmosⓘ | true | true |
Gaming
| Spec | TCL - QM851 Mini LED 65 | Samsung - S95F QD-OLED 77 |
|---|---|---|
| HDMI 2.1 portsⓘ | 2 | 4lead |
| VRRⓘ | true | true |
| ALLM | true | true |
Frequently asked
Which is brighter, QM851 Mini LED 65 or S95F QD-OLED 77?+
QM851 Mini LED 65 peaks at 5000 nits vs 3800 nits.
Which is better for gaming, QM851 Mini LED 65 or S95F QD-OLED 77?+
S95F QD-OLED 77 offers 165Hz refresh and 4 HDMI 2.1 ports.
Does QM851 Mini LED 65 or S95F QD-OLED 77 support Dolby Vision?+
QM851 Mini LED 65 supports Dolby Vision; S95F QD-OLED 77 does not.