Xiaomi
Xiaomi 15
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Released 2025-03
Best Smartphones · head-to-head
Xiaomi 15 vs Asus Zenfone 12 Ultra
A sourced, side-by-side comparison. Xiaomi 15 is cheaper at —. Every spec and price links to its source.
Asus
Asus Zenfone 12 Ultra
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Released 2025-02
Which is better: the Xiaomi 15 or Asus Zenfone 12 Ultra?
The Asus Zenfone 12 Ultra wins 2 of the 3 specs we compare head to head; the other wins 1.
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Key specs, head to head
The numbers that decide it, drawn to scale — longer bar wins, the accent bar is the stronger figure.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Xiaomi 15 | Asus Zenfone 12 Ultra |
|---|---|---|
| US price | — | — |
| Brand | Xiaomi | Asus |
| Released | 2025-03 | 2025-02 |
| Display (in) | 6.36 | 6.78 |
| Display type | LTPO OLED | LTPO AMOLED |
| Refresh (Hz) | 120 | 144 |
| Chipset | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 8 Elite |
| RAM (GB) | 12 | 12 |
| Storage (GB) | 256 | 256 |
| Main camera (MP) | 50 | 50 |
| Battery (mAh) | 5240 | 5500 |
| Charge (W) | 90 | 65 |
| Weight (g) | 191 | 220 |
| OS | Android 15 | Android 15 |
| IP rating | IP68 | IP68 |
| Fiveg | Yes | Yes |
Sources — Xiaomi 15: gsmarena.com (verified 2026-06-15). Asus Zenfone 12 Ultra: gsmarena.com (verified 2026-06-15).
What's the difference between the Xiaomi 15 and Asus Zenfone 12 Ultra?
Where the two actually differ on the specs we track (6 of 13). Matching specs are omitted.
- Display (in): Xiaomi 15 6.36 vs Asus Zenfone 12 Ultra 6.78
- Display type: Xiaomi 15 LTPO OLED vs Asus Zenfone 12 Ultra LTPO AMOLED
- Refresh (Hz): Xiaomi 15 120 vs Asus Zenfone 12 Ultra 144
- Battery (mAh): Xiaomi 15 5240 vs Asus Zenfone 12 Ultra 5500
- Charge (W): Xiaomi 15 90 vs Asus Zenfone 12 Ultra 65
- Weight (g): Xiaomi 15 191 vs Asus Zenfone 12 Ultra 220