Between the Nord 4 and Xiaomi 15, the Nord 4 comes out ahead in wired charging and screen size, while the Xiaomi 15 wins on antutu and front camera. Overall, the Nord 4 scores 65.8 and the Xiaomi 15 scores 70 on our Mars Score.
Which should you buy?
The Xiaomi 15 edges ahead on the Mars Score (65.8 vs 70), but the 4.2-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Nord 4 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 wired charging, screen size, battery capacity.
Pick the Xiaomi 15 if you photograph or shoot video regularly and want the better imaging pipeline of the two. Its strongest claims are antutu, front camera, weight, among others.
Both ship with comparable ram, main camera, refresh rate, 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 - Nord 4 wins
- ▲Wired charging — 11.11% more. 100 W vs 90 W.
- ▲Screen size — 5.97% more. 6.74 " vs 6.36 ".
- ▲Battery capacity — 1.85% more. 5500 mAh vs 5400 mAh.
Why Xiaomi 15 wins
- ▲AnTuTu — 148.15% more. 2680000 vs 1080000.
- ▲Front camera — 100.00% more. 32 MP vs 16 MP.
- ▲Weight — 7.50 g less. 192 vs 199.5.
- ▲Pixel density — 2.22% more. 460 ppi vs 450 ppi.
- ▲Water resistance: IP68 (vs IP65).
- ▲Wireless charging: 50 W vs 0 W.
Spec comparison
Design
| Spec | OnePlus - Nord 4 | Xiaomi 15 |
|---|---|---|
| Weight | 199.5 g | 192 glead |
| Thickness | 8.0 mmlead | 8.1 mm |
| Water resistanceⓘ | IP65 | IP68lead |
| Form factor | bar | bar |
Display
| Spec | OnePlus - Nord 4 | Xiaomi 15 |
|---|---|---|
| Screen sizeⓘ | 6.74 "lead | 6.36 " |
| Pixel densityⓘ | 450 ppi | 460 ppilead |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 2150 nits | 3200 nitslead |
Performance
Cameras
| Spec | OnePlus - Nord 4 | Xiaomi 15 |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 16 MP | 32 MPlead |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | OnePlus - Nord 4 | Xiaomi 15 |
|---|---|---|
| Battery capacity | 5500 mAhlead | 5400 mAh |
| Wired chargingⓘ | 100 Wlead | 90 W |
| Wireless chargingⓘ | 0 W | 50 Wlead |
Connectivity
| Spec | OnePlus - Nord 4 | Xiaomi 15 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | OnePlus - Nord 4 | Xiaomi 15 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 4 years | 4 years |
Frequently asked
Which has better battery, Nord 4 or Xiaomi 15?+
Nord 4 has 1.9% more battery — 5500 mAh vs 5400 mAh.
Which is lighter, Nord 4 or Xiaomi 15?+
Xiaomi 15 is 8g lighter — 199.5g vs 192g.
Is Nord 4 waterproof?+
Nord 4 has an IP65 rating.
Does Xiaomi 15 support 5G?+
Yes, Xiaomi 15 supports 5G.
Which has a better camera, Nord 4 or Xiaomi 15?+
Xiaomi 15 has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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