OnePlus 13 vs OnePlus 15

The OnePlus 15 edges ahead on the Mars Score (72.3 vs 76.7), but the 4.4-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the OnePlus 13 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 pixel density, weight, screen size. The single most decisive one: Pixel density — 13.33% more. 510 ppi vs 450 ppi.

Pick the OnePlus 15 if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. Its strongest claims are battery capacity, wired charging, antutu, among others. The single most decisive one: Battery capacity — 25.00% more. 7500 mAh vs 6000 mAh.

Both ship with comparable ram, main camera, refresh rate, 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.