Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | LG - C5 OLED 65 | LG - B5 OLED 65 |
|---|---|---|
| Peak brightness | 1300 nits | 750 nits |
| Refresh rate | 144 Hz | 120 Hz |
Between the C5 OLED 65 and B5 OLED 65, the C5 OLED 65 comes out ahead in peak brightness / refresh rate, while the B5 OLED 65 wins on several specs. Overall, the C5 OLED 65 scores 69 and the B5 OLED 65 scores 65 on our Mars Score.
Which should you buy?
The C5 OLED 65 edges ahead on the Mars Score (69 vs 65), but the 4.0-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the C5 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. The biggest gaps in its favor are peak brightness, refresh rate. The single most decisive one: Peak brightness — 73.33% more. 1300 nits vs 750 nits.
The B5 OLED 65 similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
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 - C5 OLED 65 or LG - B5 OLED 65?
LG - C5 OLED 65 leads the current Mars Score by 4.0 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 - C5 OLED 65 if…
LG - C5 OLED 65 has the measurable edge on peak brightness nits, refresh rate hz.
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.
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 65 wins
- ▲Peak brightness — 73.33% more. 1300 nits vs 750 nits.
- ▲Refresh rate — 20.00% more. 144 Hz vs 120 Hz.
Why LG - B5 OLED 65 wins
- No decisive advantages.
Spec comparison
Display
| Spec | LG - C5 OLED 65 | LG - B5 OLED 65 |
|---|---|---|
| Screen size | 65 " | 65 " |
| Panel typeⓘ | OLED | OLED |
| Resolutionⓘ | 4K | 4K |
| Refresh rateⓘ | 144 Hzlead | 120 Hz |
| Peak brightnessⓘ | 1300 nitslead | 750 nits |
HDR & Smart
| Spec | LG - C5 OLED 65 | LG - B5 OLED 65 |
|---|---|---|
| Dolby Visionⓘ | true | true |
| HDR10+ⓘ | false | false |
| Smart OS | webOS | webOS |
| Dolby Atmosⓘ | true | true |
Gaming
| Spec | LG - C5 OLED 65 | LG - B5 OLED 65 |
|---|---|---|
| HDMI 2.1 portsⓘ | 4 | 4 |
| VRRⓘ | true | true |
| ALLM | true | true |
Frequently asked
Which is brighter, C5 OLED 65 or B5 OLED 65?+
C5 OLED 65 peaks at 1300 nits vs 750 nits.
Which is better for gaming, C5 OLED 65 or B5 OLED 65?+
C5 OLED 65 offers 144Hz refresh and 4 HDMI 2.1 ports.
Does C5 OLED 65 or B5 OLED 65 support Dolby Vision?+
Both support Dolby Vision.