Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | LG - C5 OLED 55 | Sony - Bravia 8 OLED 65 |
|---|---|---|
| Peak brightness | 1300 nits | 830 nits |
| Refresh rate | 144 Hz | 120 Hz |
| Screen size | 55 " | 65 " |
| HDMI 2.1 ports | 4 | 2 |
| Smart OS | webOS | Google TV |
Between the C5 OLED 55 and Bravia 8 OLED 65, the C5 OLED 55 comes out ahead in peak brightness / refresh rate, while the Bravia 8 OLED 65 wins on screen size / smart os. Overall, the C5 OLED 55 scores 66.8 and the Bravia 8 OLED 65 scores 65.3 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (66.8 vs 65.3). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the C5 OLED 55 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, refresh rate, hdmi 2.1 ports. The single most decisive one: Peak brightness — 56.63% more. 1300 nits vs 830 nits.
Pick the Bravia 8 OLED 65 if you care most about screen size / smart os. Its strongest claims are screen size, smart os. The single most decisive one: Screen size — 18.18% more. 65 " vs 55 ".
Both ship with comparable panel type, dolby vision, vrr, 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: LG - C5 OLED 55 or Sony - Bravia 8 OLED 65?
LG - C5 OLED 55 leads the current Mars Score by 1.5 points.The more useful decision is the trade-off behind that result: compare screen size, refresh rate, hdmi 2.1 ports against the way you will actually use the product.
Choose LG - C5 OLED 55 if…
LG - C5 OLED 55 has the measurable edge on peak brightness nits, refresh rate hz, hdmi 2 1 count.
Choose Sony - Bravia 8 OLED 65 if…
Sony - Bravia 8 OLED 65 has the measurable edge on screen size in, smart os.
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 LG - C5 OLED 55 wins
- ▲Peak brightness — 56.63% more. 1300 nits vs 830 nits.
- ▲Refresh rate — 20.00% more. 144 Hz vs 120 Hz.
- ▲HDMI 2.1 ports — 2.00 more. 4 vs 2.
Why Sony - Bravia 8 OLED 65 wins
- ▲Screen size — 18.18% more. 65 " vs 55 ".
- ▲Smart OS: Google TV (vs webOS).
Spec comparison
Display
| Spec | LG - C5 OLED 55 | Sony - Bravia 8 OLED 65 |
|---|---|---|
| Screen size | 55 " | 65 "lead |
| Panel typeⓘ | OLED | OLED |
| Resolutionⓘ | 4K | 4K |
| Refresh rateⓘ | 144 Hzlead | 120 Hz |
| Peak brightnessⓘ | 1300 nitslead | 830 nits |
HDR & Smart
| Spec | LG - C5 OLED 55 | Sony - Bravia 8 OLED 65 |
|---|---|---|
| Dolby Visionⓘ | true | true |
| HDR10+ⓘ | false | false |
| Smart OS | webOS | Google TVlead |
| Dolby Atmosⓘ | true | true |
Gaming
| Spec | LG - C5 OLED 55 | Sony - Bravia 8 OLED 65 |
|---|---|---|
| HDMI 2.1 portsⓘ | 4lead | 2 |
| VRRⓘ | true | true |
| ALLM | true | true |
Frequently asked
Which is brighter, C5 OLED 55 or Bravia 8 OLED 65?+
C5 OLED 55 peaks at 1300 nits vs 830 nits.
Which is better for gaming, C5 OLED 55 or Bravia 8 OLED 65?+
C5 OLED 55 offers 144Hz refresh and 4 HDMI 2.1 ports.
Does C5 OLED 55 or Bravia 8 OLED 65 support Dolby Vision?+
Both support Dolby Vision.