Between the OnePlus 13 and Xiaomi 15, the OnePlus 13 comes out ahead in ram and battery capacity, while the Xiaomi 15 wins on weight and antutu. Overall, the OnePlus 13 scores 73.8 and the Xiaomi 15 scores 70 on our Mars Score.
Which should you buy?
The OnePlus 13 edges ahead on the Mars Score (73.8 vs 70), but the 3.8-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the OnePlus 13 if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. The biggest gaps in its favor are ram, battery capacity, wired charging, among others.
Pick the Xiaomi 15 if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. Its strongest claims are weight, antutu.
Both ship with comparable main camera, refresh rate, 5g support, so those specs don't 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 tells you both are well-rounded; the differences are about trade-offs, not quality.
Why OnePlus 13 wins
- ▲RAM — 33.33% more. 16 GB vs 12 GB.
- ▲Battery capacity — 11.11% more. 6000 mAh vs 5400 mAh.
- ▲Wired charging — 11.11% more. 100 W vs 90 W.
- ▲Pixel density — 10.87% more. 510 ppi vs 460 ppi.
- ▲Screen size — 7.23% more. 6.82 " vs 6.36 ".
- ▲Water resistance: IP69 (vs IP68).
Why Xiaomi 15 wins
- ▲Weight — 18.00 g less. 192 vs 210.
- ▲AnTuTu — 1.52% more. 2680000 vs 2640000.
Spec comparison
Design
| Spec | OnePlus 13 | Xiaomi 15 |
|---|---|---|
| Weight | 210 g | 192 glead |
| Thickness | 8.5 mm | 8.1 mmlead |
| Water resistanceⓘ | IP69lead | IP68 |
| Form factor | bar | bar |
Display
| Spec | OnePlus 13 | Xiaomi 15 |
|---|---|---|
| Screen sizeⓘ | 6.82 "lead | 6.36 " |
| Pixel densityⓘ | 510 ppilead | 460 ppi |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 4500 nitslead | 3200 nits |
Performance
Cameras
| Spec | OnePlus 13 | Xiaomi 15 |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MP | 32 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | OnePlus 13 | Xiaomi 15 |
|---|---|---|
| Battery capacity | 6000 mAhlead | 5400 mAh |
| Wired chargingⓘ | 100 Wlead | 90 W |
| Wireless chargingⓘ | 50 W | 50 W |
Connectivity
| Spec | OnePlus 13 | Xiaomi 15 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | OnePlus 13 | Xiaomi 15 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 4 years | 4 years |
Frequently asked
Which has better battery, OnePlus 13 or Xiaomi 15?+
OnePlus 13 has 11.1% more battery — 6000 mAh vs 5400 mAh.
Which is lighter, OnePlus 13 or Xiaomi 15?+
Xiaomi 15 is 18g lighter — 210g vs 192g.
Is OnePlus 13 waterproof?+
OnePlus 13 has an IP69 rating.
Does Xiaomi 15 support 5G?+
Yes, Xiaomi 15 supports 5G.
Which has more RAM, OnePlus 13 or Xiaomi 15?+
OnePlus 13 offers 16GB of RAM.
Which has a better camera, OnePlus 13 or Xiaomi 15?+
Xiaomi 15 has a 50 MP main camera vs 50 MP.
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.