Between the Pixel 9 Pro Fold and Xiaomi 15 Ultra, the Pixel 9 Pro Fold comes out ahead in screen size and water resistance, while the Xiaomi 15 Ultra wins on wireless charging and wired charging. Overall, the Pixel 9 Pro Fold scores 67.1 and the Xiaomi 15 Ultra scores 73.8 on our Mars Score.
Which should you buy?
The Xiaomi 15 Ultra edges ahead on the Mars Score (67.1 vs 73.8), but the 6.7-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Pixel 9 Pro Fold 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, water resistance, 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 ram, 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 Pro Fold wins
- ▲Screen size — 18.87% more. 8.0 " vs 6.73 ".
- ▲Water resistance: IPX8 (vs IP68).
- ▲Promised OS updates: 7 (vs 4).
Why Xiaomi 15 Ultra wins
- ▲Wireless charging — 966.67% more. 80 W vs 7.5 W.
- ▲Wired charging — 328.57% more. 90 W vs 21 W.
- ▲Front camera — 220.00% more. 32 MP vs 10 MP.
- ▲AnTuTu — 119.35% more. 2720000 vs 1240000.
- ▲Pixel density — 39.95% more. 522 ppi vs 373 ppi.
- ▲Battery capacity — 29.03% more. 6000 mAh vs 4650 mAh.
- ▲Weight — 28.00 g less. 229 vs 257.
- ▲Main camera — 4.17% more. 50 MP vs 48 MP.
Spec comparison
Design
| Spec | Google - Pixel 9 Pro Fold | Xiaomi 15 Ultra |
|---|---|---|
| Weight | 257 g | 229 glead |
| Thickness | 10.5 mm | 9.4 mmlead |
| Water resistanceⓘ | IPX8lead | IP68 |
| Form factor | foldable_booklead | bar |
Display
| Spec | Google - Pixel 9 Pro Fold | Xiaomi 15 Ultra |
|---|---|---|
| Screen sizeⓘ | 8.0 "lead | 6.73 " |
| Pixel densityⓘ | 373 ppi | 522 ppilead |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 2700 nits | 3200 nitslead |
Performance
Cameras
| Spec | Google - Pixel 9 Pro Fold | Xiaomi 15 Ultra |
|---|---|---|
| Main cameraⓘ | 48 MP | 50 MPlead |
| Front camera | 10 MP | 32 MPlead |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Google - Pixel 9 Pro Fold | Xiaomi 15 Ultra |
|---|---|---|
| Battery capacity | 4650 mAh | 6000 mAhlead |
| Wired chargingⓘ | 21 W | 90 Wlead |
| Wireless chargingⓘ | 7.5 W | 80 Wlead |
Connectivity
| Spec | Google - Pixel 9 Pro Fold | Xiaomi 15 Ultra |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Google - Pixel 9 Pro Fold | Xiaomi 15 Ultra |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 7 yearslead | 4 years |
Frequently asked
Which has better battery, Pixel 9 Pro Fold or Xiaomi 15 Ultra?+
Xiaomi 15 Ultra has 29.0% more battery — 4650 mAh vs 6000 mAh.
Which is lighter, Pixel 9 Pro Fold or Xiaomi 15 Ultra?+
Xiaomi 15 Ultra is 28g lighter — 257g vs 229g.
Is Pixel 9 Pro Fold waterproof?+
Pixel 9 Pro Fold has an IPX8 rating.
Does Xiaomi 15 Ultra support 5G?+
Yes, Xiaomi 15 Ultra supports 5G.
Which has a better camera, Pixel 9 Pro Fold or Xiaomi 15 Ultra?+
Xiaomi 15 Ultra has a 50 MP main camera vs 48 MP.
Spec-level deep dives
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