Between the C5 OLED 55 and QM6K 65, the C5 OLED 55 comes out ahead in hdmi 2.1 ports and panel type, while the QM6K 65 wins on peak brightness and screen size. Overall, the C5 OLED 55 scores 60.5 and the QM6K 65 scores 66 on our Mars Score.
Which should you buy?
The QM6K 65 edges ahead on the Mars Score (60.5 vs 66), but the 5.5-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the C5 OLED 55 if you care most about hdmi 2.1 ports and panel type. The biggest gaps in its favor are hdmi 2.1 ports, panel type.
Pick the QM6K 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 peak brightness, screen size, smart os.
Both ship with comparable refresh rate, dolby vision, vrr, so those specs don't separate the two — focus on the differences below.
Bottom line: the QM6K 65 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why LG - C5 OLED 55 wins
- ▲HDMI 2.1 ports — 2.00 more. 4 vs 2.
- ▲Panel type: OLED (vs Mini-LED).
Why TCL - QM6K 65 wins
- ▲Peak brightness — 38.46% more. 1800 nits vs 1300 nits.
- ▲Screen size — 18.18% more. 65 " vs 55 ".
- ▲Smart OS: Google TV (vs webOS).
Spec comparison
Display
| Spec | LG - C5 OLED 55 | TCL - QM6K 65 |
|---|---|---|
| Screen sizeⓘ | 55 " | 65 "lead |
| Panel typeⓘ | OLEDlead | Mini-LED |
| Resolutionⓘ | 4K | 4K |
| Refresh rateⓘ | 144 Hz | 144 Hz |
| Peak brightnessⓘ | 1300 nits | 1800 nitslead |
HDR & Smart
| Spec | LG - C5 OLED 55 | TCL - QM6K 65 |
|---|---|---|
| Dolby Visionⓘ | true | true |
| HDR10+ⓘ | false | truelead |
| Smart OS | webOS | Google TVlead |
| Dolby Atmosⓘ | true | true |
Gaming
| Spec | LG - C5 OLED 55 | TCL - QM6K 65 |
|---|---|---|
| HDMI 2.1 portsⓘ | 4lead | 2 |
| VRRⓘ | true | true |
| ALLM | true | true |
Frequently asked
Which is brighter, C5 OLED 55 or QM6K 65?+
QM6K 65 peaks at 1800 nits vs 1300 nits.
Which is better for gaming, C5 OLED 55 or QM6K 65?+
C5 OLED 55 offers 144Hz refresh and 4 HDMI 2.1 ports.
Does C5 OLED 55 or QM6K 65 support Dolby Vision?+
Both support Dolby Vision.
Spec-level deep dives
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