Between the Pixel 9 and Xiaomi 15 Ultra, the Pixel 9 comes out ahead in weight and promised os updates, while the Xiaomi 15 Ultra wins on wireless charging and wired charging. Overall, the Pixel 9 scores 63.5 and the Xiaomi 15 Ultra scores 73.8 on our Mars Score.
Which should you buy?
The Xiaomi 15 Ultra is the clear pick on raw spec strength, leading by 10.3 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 Pixel 9 if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight, promised os updates.
Pick the Xiaomi 15 Ultra if you photograph or shoot video regularly and want the better imaging pipeline of the two. Its strongest claims are wireless charging, wired charging, front camera, 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 Ultra is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Google - Pixel 9 wins
- ▲Weight — 31.00 g less. 198 vs 229.
- ▲Promised OS updates: 7 (vs 4).
Why Xiaomi 15 Ultra wins
- ▲Wireless charging — 433.33% more. 80 W vs 15 W.
- ▲Wired charging — 233.33% more. 90 W vs 27 W.
- ▲Front camera — 204.76% more. 32 MP vs 10.5 MP.
- ▲AnTuTu — 119.35% more. 2720000 vs 1240000.
- ▲RAM — 33.33% more. 16 GB vs 12 GB.
- ▲Battery capacity — 27.66% more. 6000 mAh vs 4700 mAh.
- ▲Pixel density — 23.70% more. 522 ppi vs 422 ppi.
- ▲Screen size — 6.83% more. 6.73 " vs 6.3 ".
Spec comparison
Design
| Spec | Google - Pixel 9 | Xiaomi 15 Ultra |
|---|---|---|
| Weight | 198 glead | 229 g |
| Thickness | 8.5 mmlead | 9.4 mm |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | bar | bar |
Display
| Spec | Google - Pixel 9 | Xiaomi 15 Ultra |
|---|---|---|
| Screen sizeⓘ | 6.3 " | 6.73 "lead |
| Pixel densityⓘ | 422 ppi | 522 ppilead |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 2700 nits | 3200 nitslead |
Performance
Cameras
| Spec | Google - Pixel 9 | Xiaomi 15 Ultra |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 10.5 MP | 32 MPlead |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Google - Pixel 9 | Xiaomi 15 Ultra |
|---|---|---|
| Battery capacity | 4700 mAh | 6000 mAhlead |
| Wired chargingⓘ | 27 W | 90 Wlead |
| Wireless chargingⓘ | 15 W | 80 Wlead |
Connectivity
| Spec | Google - Pixel 9 | Xiaomi 15 Ultra |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Google - Pixel 9 | Xiaomi 15 Ultra |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 7 yearslead | 4 years |
Frequently asked
Which has better battery, Pixel 9 or Xiaomi 15 Ultra?+
Xiaomi 15 Ultra has 27.7% more battery — 4700 mAh vs 6000 mAh.
Which is lighter, Pixel 9 or Xiaomi 15 Ultra?+
Pixel 9 is 31g lighter — 198g vs 229g.
Is Pixel 9 waterproof?+
Pixel 9 has an IP68 rating.
Does Xiaomi 15 Ultra support 5G?+
Yes, Xiaomi 15 Ultra supports 5G.
Which has more RAM, Pixel 9 or Xiaomi 15 Ultra?+
Xiaomi 15 Ultra offers 16GB of RAM.
Which has a better camera, Pixel 9 or Xiaomi 15 Ultra?+
Xiaomi 15 Ultra has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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