Between the Xiaomi 15 Ultra and Xiaomi 16 Ultra, the Xiaomi 15 Ultra comes out ahead in several specs, while the Xiaomi 16 Ultra wins on wired charging and antutu. Overall, the Xiaomi 15 Ultra scores 73.8 and the Xiaomi 16 Ultra scores 74.3 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (73.8 vs 74.3). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.
The Xiaomi 15 Ultra doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.
Pick the Xiaomi 16 Ultra 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 wired charging, antutu, promised os updates.
Both ship with comparable battery capacity, ram, main camera, 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 Ultra wins
- No decisive advantages.
Why Xiaomi 16 Ultra wins
- ▲Wired charging — 11.11% more. 100 W vs 90 W.
- ▲AnTuTu — 8.46% more. 2950000 vs 2720000.
- ▲Promised OS updates: 5 (vs 4).
Spec comparison
Design
| Spec | Xiaomi 15 Ultra | Xiaomi 16 Ultra |
|---|---|---|
| Weight | 229 g | 229 g |
| Thickness | 9.4 mm | 9.2 mmlead |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | bar | bar |
Display
| Spec | Xiaomi 15 Ultra | Xiaomi 16 Ultra |
|---|---|---|
| Screen sizeⓘ | 6.73 " | 6.73 " |
| Pixel densityⓘ | 522 ppi | 522 ppi |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 3200 nits | 3200 nits |
Performance
Cameras
| Spec | Xiaomi 15 Ultra | Xiaomi 16 Ultra |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MP | 32 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Xiaomi 15 Ultra | Xiaomi 16 Ultra |
|---|---|---|
| Battery capacity | 6000 mAh | 6000 mAh |
| Wired chargingⓘ | 90 W | 100 Wlead |
| Wireless chargingⓘ | 80 W | 80 W |
Connectivity
| Spec | Xiaomi 15 Ultra | Xiaomi 16 Ultra |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Xiaomi 15 Ultra | Xiaomi 16 Ultra |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 4 years | 5 yearslead |
Frequently asked
Which has better battery, Xiaomi 15 Ultra or Xiaomi 16 Ultra?+
Xiaomi 16 Ultra has 0.0% more battery — 6000 mAh vs 6000 mAh.
Which is lighter, Xiaomi 15 Ultra or Xiaomi 16 Ultra?+
Xiaomi 16 Ultra is 0g lighter — 229g vs 229g.
Is Xiaomi 15 Ultra waterproof?+
Xiaomi 15 Ultra has an IP68 rating.
Does Xiaomi 16 Ultra support 5G?+
Yes, Xiaomi 16 Ultra supports 5G.
Which has a better camera, Xiaomi 15 Ultra or Xiaomi 16 Ultra?+
Xiaomi 16 Ultra has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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