Between the Phone (3a) Pro and Xiaomi 15 Pro, the Phone (3a) Pro comes out ahead in front camera and weight, while the Xiaomi 15 Pro wins on antutu and wired charging. Overall, the Phone (3a) Pro scores 63.8 and the Xiaomi 15 Pro scores 74 on our Mars Score.
Which should you buy?
The Xiaomi 15 Pro is the clear pick on raw spec strength, leading by 10.2 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the Phone (3a) Pro if you photograph or shoot video regularly and want the better imaging pipeline of the two. The biggest gaps in its favor are front camera, weight, screen size.
Pick the Xiaomi 15 Pro if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. Its strongest claims are antutu, wired charging, pixel density, among others.
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: the Xiaomi 15 Pro is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Nothing - Phone (3a) Pro wins
- ▲Front camera — 56.25% more. 50 MP vs 32 MP.
- ▲Weight — 2.00 g less. 211 vs 213.
- ▲Screen size — 0.59% more. 6.77 " vs 6.73 ".
Why Xiaomi 15 Pro wins
- ▲AnTuTu — 218.82% more. 2710000 vs 850000.
- ▲Wired charging — 80.00% more. 90 W vs 50 W.
- ▲Pixel density — 34.88% more. 522 ppi vs 387 ppi.
- ▲RAM — 33.33% more. 16 GB vs 12 GB.
- ▲Battery capacity — 22.00% more. 6100 mAh vs 5000 mAh.
- ▲Water resistance: IP68 (vs IP64).
- ▲Promised OS updates: 4 (vs 3).
- ▲Wireless charging: 50 W vs 0 W.
Spec comparison
Design
| Spec | Nothing - Phone (3a) Pro | Xiaomi 15 Pro |
|---|---|---|
| Weight | 211 glead | 213 g |
| Thickness | 8.4 mm | 8.4 mm |
| Water resistanceⓘ | IP64 | IP68lead |
| Form factor | bar | bar |
Display
| Spec | Nothing - Phone (3a) Pro | Xiaomi 15 Pro |
|---|---|---|
| Screen sizeⓘ | 6.77 "lead | 6.73 " |
| Pixel densityⓘ | 387 ppi | 522 ppilead |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 3000 nits | 3200 nitslead |
Performance
Cameras
| Spec | Nothing - Phone (3a) Pro | Xiaomi 15 Pro |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 50 MPlead | 32 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Nothing - Phone (3a) Pro | Xiaomi 15 Pro |
|---|---|---|
| Battery capacity | 5000 mAh | 6100 mAhlead |
| Wired chargingⓘ | 50 W | 90 Wlead |
| Wireless chargingⓘ | 0 W | 50 Wlead |
Connectivity
| Spec | Nothing - Phone (3a) Pro | Xiaomi 15 Pro |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Nothing - Phone (3a) Pro | Xiaomi 15 Pro |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 3 years | 4 yearslead |
Frequently asked
Which has better battery, Phone (3a) Pro or Xiaomi 15 Pro?+
Xiaomi 15 Pro has 22.0% more battery — 5000 mAh vs 6100 mAh.
Which is lighter, Phone (3a) Pro or Xiaomi 15 Pro?+
Phone (3a) Pro is 2g lighter — 211g vs 213g.
Is Phone (3a) Pro waterproof?+
Phone (3a) Pro has an IP64 rating.
Does Xiaomi 15 Pro support 5G?+
Yes, Xiaomi 15 Pro supports 5G.
Which has more RAM, Phone (3a) Pro or Xiaomi 15 Pro?+
Xiaomi 15 Pro offers 16GB of RAM.
Which has a better camera, Phone (3a) Pro or Xiaomi 15 Pro?+
Xiaomi 15 Pro has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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