Between the C5 OLED 55 and G5 OLED evo 77, the C5 OLED 55 comes out ahead in several specs, while the G5 OLED evo 77 wins on peak brightness and screen size. Overall, the C5 OLED 55 scores 60.5 and the G5 OLED evo 77 scores 82.3 on our Mars Score.
Which should you buy?
The G5 OLED evo 77 is the clear pick on raw spec strength, leading by 21.8 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 C5 OLED 55 doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.
Pick the G5 OLED evo 77 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, refresh rate.
Both ship with comparable panel type, dolby vision, hdmi 2.1 ports, so those specs don't separate the two — focus on the differences below.
Bottom line: the G5 OLED evo 77 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
- No decisive advantages.
Why LG - G5 OLED evo 77 wins
- ▲Peak brightness — 207.69% more. 4000 nits vs 1300 nits.
- ▲Screen size — 40.00% more. 77 " vs 55 ".
- ▲Refresh rate — 14.58% more. 165 Hz vs 144 Hz.
Spec comparison
Display
| Spec | LG - C5 OLED 55 | LG - G5 OLED evo 77 |
|---|---|---|
| Screen sizeⓘ | 55 " | 77 "lead |
| Panel typeⓘ | OLED | OLED |
| Resolutionⓘ | 4K | 4K |
| Refresh rateⓘ | 144 Hz | 165 Hzlead |
| Peak brightnessⓘ | 1300 nits | 4000 nitslead |
HDR & Smart
| Spec | LG - C5 OLED 55 | LG - G5 OLED evo 77 |
|---|---|---|
| Dolby Visionⓘ | true | true |
| HDR10+ⓘ | false | false |
| Smart OS | webOS | webOS |
| Dolby Atmosⓘ | true | true |
Gaming
| Spec | LG - C5 OLED 55 | LG - G5 OLED evo 77 |
|---|---|---|
| HDMI 2.1 portsⓘ | 4 | 4 |
| VRRⓘ | true | true |
| ALLM | true | true |
Frequently asked
Which is brighter, C5 OLED 55 or G5 OLED evo 77?+
G5 OLED evo 77 peaks at 4000 nits vs 1300 nits.
Which is better for gaming, C5 OLED 55 or G5 OLED evo 77?+
G5 OLED evo 77 offers 165Hz refresh and 4 HDMI 2.1 ports.
Does C5 OLED 55 or G5 OLED evo 77 support Dolby Vision?+
Both support Dolby Vision.
Spec-level deep dives
More from the same brands
vsMars is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. Learn more.