Between the Phone (3) and Xiaomi 15, the Phone (3) comes out ahead in screen size and promised os updates, while the Xiaomi 15 wins on wireless charging and wired charging. Overall, the Phone (3) scores 68.7 and the Xiaomi 15 scores 70 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (68.7 vs 70). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.
Pick the Phone (3) 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 screen size, promised os updates.
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 wireless charging, wired charging, antutu, 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 Nothing - Phone (3) wins
- ▲Screen size — 5.35% more. 6.7 " vs 6.36 ".
- ▲Promised OS updates: 5 (vs 4).
Why Xiaomi 15 wins
- ▲Wireless charging — 233.33% more. 50 W vs 15 W.
- ▲Wired charging — 38.46% more. 90 W vs 65 W.
- ▲AnTuTu — 30.73% more. 2680000 vs 2050000.
- ▲Battery capacity — 4.85% more. 5400 mAh vs 5150 mAh.
- ▲Weight — 4.00 g less. 192 vs 196.
Spec comparison
Design
| Spec | Nothing - Phone (3) | Xiaomi 15 |
|---|---|---|
| Weight | 196 g | 192 glead |
| Thickness | 8.4 mm | 8.1 mmlead |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | bar | bar |
Display
| Spec | Nothing - Phone (3) | Xiaomi 15 |
|---|---|---|
| Screen sizeⓘ | 6.7 "lead | 6.36 " |
| Pixel densityⓘ | 460 ppi | 460 ppi |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 4500 nitslead | 3200 nits |
Performance
Cameras
| Spec | Nothing - Phone (3) | Xiaomi 15 |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MP | 32 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Nothing - Phone (3) | Xiaomi 15 |
|---|---|---|
| Battery capacity | 5150 mAh | 5400 mAhlead |
| Wired chargingⓘ | 65 W | 90 Wlead |
| Wireless chargingⓘ | 15 W | 50 Wlead |
Connectivity
| Spec | Nothing - Phone (3) | Xiaomi 15 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Nothing - Phone (3) | Xiaomi 15 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 5 yearslead | 4 years |
Frequently asked
Which has better battery, Phone (3) or Xiaomi 15?+
Xiaomi 15 has 4.9% more battery — 5150 mAh vs 5400 mAh.
Which is lighter, Phone (3) or Xiaomi 15?+
Xiaomi 15 is 4g lighter — 196g vs 192g.
Is Phone (3) waterproof?+
Phone (3) has an IP68 rating.
Does Xiaomi 15 support 5G?+
Yes, Xiaomi 15 supports 5G.
Which has a better camera, Phone (3) or Xiaomi 15?+
Xiaomi 15 has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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