Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | LG - B5 OLED 65 | LG - C4 OLED 65 |
|---|---|---|
| Peak brightness | 750 nits | 1000 nits |
| Refresh rate | 120 Hz | 144 Hz |
Between the B5 OLED 65 and C4 OLED 65, the B5 OLED 65 comes out ahead in several specs, while the C4 OLED 65 wins on peak brightness / refresh rate. Overall, the B5 OLED 65 scores 65 and the C4 OLED 65 scores 67.8 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (65 vs 67.8). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
The B5 OLED 65 does not pull ahead on any single popular-comparison spec — its strengths sit in the spec-table groups rather than the headline advantages.
Pick the C4 OLED 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, refresh rate. The single most decisive one: Peak brightness — 33.33% more. 1000 nits vs 750 nits.
Both ship with comparable screen size, panel type, dolby vision, 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 - B5 OLED 65 or LG - C4 OLED 65?
LG - C4 OLED 65 leads the current Mars Score by 2.8 points.The more useful decision is the trade-off behind that result: compare refresh rate against the way you will actually use the product.
Choose LG - B5 OLED 65 if…
LG - B5 OLED 65 does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
Choose LG - C4 OLED 65 if…
LG - C4 OLED 65 has the measurable edge on peak brightness nits, refresh rate hz.
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 - B5 OLED 65 wins
- No decisive advantages.
Why LG - C4 OLED 65 wins
- ▲Peak brightness — 33.33% more. 1000 nits vs 750 nits.
- ▲Refresh rate — 20.00% more. 144 Hz vs 120 Hz.
Spec comparison
Display
| Spec | LG - B5 OLED 65 | LG - C4 OLED 65 |
|---|---|---|
| Screen size | 65 " | 65 " |
| Panel typeⓘ | OLED | OLED |
| Resolutionⓘ | 4K | 4K |
| Refresh rateⓘ | 120 Hz | 144 Hzlead |
| Peak brightnessⓘ | 750 nits | 1000 nitslead |
HDR & Smart
| Spec | LG - B5 OLED 65 | LG - C4 OLED 65 |
|---|---|---|
| Dolby Visionⓘ | true | true |
| HDR10+ⓘ | false | false |
| Smart OS | webOS | webOS |
| Dolby Atmosⓘ | true | true |
Gaming
| Spec | LG - B5 OLED 65 | LG - C4 OLED 65 |
|---|---|---|
| HDMI 2.1 portsⓘ | 4 | 4 |
| VRRⓘ | true | true |
| ALLM | true | true |
Frequently asked
Which is brighter, B5 OLED 65 or C4 OLED 65?+
C4 OLED 65 peaks at 1000 nits vs 750 nits.
Which is better for gaming, B5 OLED 65 or C4 OLED 65?+
C4 OLED 65 offers 144Hz refresh and 4 HDMI 2.1 ports.
Does B5 OLED 65 or C4 OLED 65 support Dolby Vision?+
Both support Dolby Vision.