Between the Xiaomi 15 and MIX Fold 4, the Xiaomi 15 comes out ahead in front camera and wired charging, while the MIX Fold 4 wins on ram and screen size. Overall, the Xiaomi 15 scores 70 and the MIX Fold 4 scores 71.4 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (70 vs 71.4). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.
Pick the Xiaomi 15 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, wired charging, weight, among others.
Pick the MIX Fold 4 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 ram, screen size, water resistance.
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: 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 Xiaomi 15 wins
- ▲Front camera — 60.00% more. 32 MP vs 20 MP.
- ▲Wired charging — 34.33% more. 90 W vs 67 W.
- ▲Weight — 34.00 g less. 192 vs 226.
- ▲AnTuTu — 31.37% more. 2680000 vs 2040000.
- ▲Pixel density — 14.43% more. 460 ppi vs 402 ppi.
- ▲Battery capacity — 5.88% more. 5400 mAh vs 5100 mAh.
Why Xiaomi - MIX Fold 4 wins
- ▲RAM — 33.33% more. 16 GB vs 12 GB.
- ▲Screen size — 25.47% more. 7.98 " vs 6.36 ".
- ▲Water resistance: IPX8 (vs IP68).
Spec comparison
Design
| Spec | Xiaomi 15 | Xiaomi - MIX Fold 4 |
|---|---|---|
| Weight | 192 glead | 226 g |
| Thickness | 8.1 mmlead | 9.47 mm |
| Water resistanceⓘ | IP68 | IPX8lead |
| Form factor | bar | foldable_booklead |
Display
| Spec | Xiaomi 15 | Xiaomi - MIX Fold 4 |
|---|---|---|
| Screen sizeⓘ | 6.36 " | 7.98 "lead |
| Pixel densityⓘ | 460 ppilead | 402 ppi |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 3200 nitslead | 3000 nits |
Performance
Cameras
| Spec | Xiaomi 15 | Xiaomi - MIX Fold 4 |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MPlead | 20 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Xiaomi 15 | Xiaomi - MIX Fold 4 |
|---|---|---|
| Battery capacity | 5400 mAhlead | 5100 mAh |
| Wired chargingⓘ | 90 Wlead | 67 W |
| Wireless chargingⓘ | 50 W | 50 W |
Connectivity
| Spec | Xiaomi 15 | Xiaomi - MIX Fold 4 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Xiaomi 15 | Xiaomi - MIX Fold 4 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 4 years | 4 years |
Frequently asked
Which has better battery, Xiaomi 15 or MIX Fold 4?+
Xiaomi 15 has 5.9% more battery — 5400 mAh vs 5100 mAh.
Which is lighter, Xiaomi 15 or MIX Fold 4?+
Xiaomi 15 is 34g lighter — 192g vs 226g.
Is Xiaomi 15 waterproof?+
Xiaomi 15 has an IP68 rating.
Does MIX Fold 4 support 5G?+
Yes, MIX Fold 4 supports 5G.
Which has more RAM, Xiaomi 15 or MIX Fold 4?+
MIX Fold 4 offers 16GB of RAM.
Which has a better camera, Xiaomi 15 or MIX Fold 4?+
MIX Fold 4 has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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