Between the Zenfone 11 Ultra and Xiaomi 15 Pro, the Zenfone 11 Ultra comes out ahead in refresh rate and screen size, while the Xiaomi 15 Pro wins on wireless charging and wired charging. Overall, the Zenfone 11 Ultra scores 71.9 and the Xiaomi 15 Pro scores 74 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (71.9 vs 74). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.
Pick the Zenfone 11 Ultra 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 refresh rate, 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 wireless charging, wired charging, pixel density, among others.
Both ship with comparable ram, main camera, 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 ASUS - Zenfone 11 Ultra wins
- ▲Refresh rate — 20.00% more. 144 Hz vs 120 Hz.
- ▲Screen size — 0.74% more. 6.78 " vs 6.73 ".
Why Xiaomi 15 Pro wins
- ▲Wireless charging — 233.33% more. 50 W vs 15 W.
- ▲Wired charging — 38.46% more. 90 W vs 65 W.
- ▲Pixel density — 34.54% more. 522 ppi vs 388 ppi.
- ▲AnTuTu — 30.92% more. 2710000 vs 2070000.
- ▲Weight — 11.00 g less. 213 vs 224.
- ▲Battery capacity — 10.91% more. 6100 mAh vs 5500 mAh.
- ▲Promised OS updates: 4 (vs 2).
Spec comparison
Design
| Spec | ASUS - Zenfone 11 Ultra | Xiaomi 15 Pro |
|---|---|---|
| Weight | 224 g | 213 glead |
| Thickness | 8.9 mm | 8.4 mmlead |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | bar | bar |
Display
| Spec | ASUS - Zenfone 11 Ultra | Xiaomi 15 Pro |
|---|---|---|
| Screen sizeⓘ | 6.78 "lead | 6.73 " |
| Pixel densityⓘ | 388 ppi | 522 ppilead |
| Refresh rateⓘ | 144 Hzlead | 120 Hz |
| Peak brightnessⓘ | 2500 nits | 3200 nitslead |
Performance
Cameras
| Spec | ASUS - Zenfone 11 Ultra | Xiaomi 15 Pro |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MP | 32 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | ASUS - Zenfone 11 Ultra | Xiaomi 15 Pro |
|---|---|---|
| Battery capacity | 5500 mAh | 6100 mAhlead |
| Wired chargingⓘ | 65 W | 90 Wlead |
| Wireless chargingⓘ | 15 W | 50 Wlead |
Connectivity
| Spec | ASUS - Zenfone 11 Ultra | Xiaomi 15 Pro |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | ASUS - Zenfone 11 Ultra | Xiaomi 15 Pro |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 2 years | 4 yearslead |
Frequently asked
Which has better battery, Zenfone 11 Ultra or Xiaomi 15 Pro?+
Xiaomi 15 Pro has 10.9% more battery — 5500 mAh vs 6100 mAh.
Which is lighter, Zenfone 11 Ultra or Xiaomi 15 Pro?+
Xiaomi 15 Pro is 11g lighter — 224g vs 213g.
Is Zenfone 11 Ultra waterproof?+
Zenfone 11 Ultra has an IP68 rating.
Does Xiaomi 15 Pro support 5G?+
Yes, Xiaomi 15 Pro supports 5G.
Which has a better camera, Zenfone 11 Ultra or Xiaomi 15 Pro?+
Xiaomi 15 Pro has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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