Redmi K90 vs Xiaomi 15 Ultra
84.3Performance79.1
65.4Display69.1
53.1Camera73.2
83.2Battery79
86.7Features78.7
5 spec wins — Redmi K908 spec wins — Xiaomi 15 Ultra
InnoReviews verdict
Xiaomi 15 Ultra wins this phone face-off, 75.9 to 74.3, pulling ahead mainly in camera (+20) and display (+4). Redmi K90 still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the Redmi K90
- Stronger performance score: 84 vs 79
- Stronger battery score: 83 vs 79
- Stronger features score: 87 vs 79
- 31% higher capacity: 7,100 mAh vs 5,410 mAh
- 14% lower thickness: 8 mm vs 9.4 mm
Reasons to pick the Xiaomi 15 Ultra
- Stronger display score: 69 vs 65
- Stronger camera score: 73 vs 53
- 525% higher ultra-wide: 50 MP vs 8 MP
- 300% higher telephoto: 200 MP vs 50 MP
- 72% higher Optical zoom: 4.3 x vs 2.5 x
Display
| Spec | Redmi K90 | Xiaomi 15 Ultra |
|---|---|---|
| Screen size | 6.59 ″ | 6.73 ″+2% |
| Panel type | AMOLED | LTPO AMOLED |
| Resolution | 2510x1156 | 1440x3200 |
| Pixel density | 419 ppi | 522 ppi+25% |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 3,500 nits+9% | 3,200 nits |
| Screen-to-body | 89.8 % | 90 % |
Performance
| Spec | Redmi K90 | Xiaomi 15 Ultra |
|---|---|---|
| Chipset | Snapdragon 8 Elite | Snapdragon 8 Elite |
| AnTuTuDifferent AnTuTu versions — not compared | 3,106,623Top 11% | 2,650,000 |
| AnTuTu 11 (CPU) | 872,376Top 15% | — |
| AnTuTu 11 (GPU) | 1,143,259Top 13% | — |
| AnTuTu 11 (Memory) | 462,601Top 6% | — |
| AnTuTu 11 (UX) | 628,387Top 13% | — |
| Geekbench 6 (single) | — | 3,050Top 12% |
| Geekbench 6 (multi) | — | 9,600Top 11% |
| RAM (max) | 16 GB | 16 GB |
| Storage options | 256GB / 512GB / 1TB | 256/512GB/1TB |
| Storage type | UFS | UFS 4.1 |
Camera
| Spec | Redmi K90 | Xiaomi 15 Ultra |
|---|---|---|
| Main camera | 50 MP | 50 MP |
| Main aperture | f/1.88 | f/1.63 |
| Ultra-wide | 8 MP | 50 MP+525% |
| Telephoto | 50 MP | 200 MP+300% |
| Optical zoom | 2.5 x | 4.3 x+72% |
| Max video | 8K@30fps | 8K@30fps |
| Front camera | 20 MP | 32 MP+60% |
| OIS | Yes | Yes |
Battery
| Spec | Redmi K90 | Xiaomi 15 Ultra |
|---|---|---|
| Capacity | 7,100 mAh+31% | 5,410 mAh |
| Wired charging | 100 W+11% | 90 W |
| Wireless charging | — | 80 W |
| Active use endurance | — | 12 h |
Design
| Spec | Redmi K90 | Xiaomi 15 Ultra |
|---|---|---|
| Weight | 206 g+9% | 226 g |
| Thickness | 8 mm+14% | 9.4 mm |
| IP rating | IP68 | IP68 |
| Frame material | Aluminum | Aluminum |
Connectivity
| Spec | Redmi K90 | Xiaomi 15 Ultra |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 7 | Wi-Fi 7 |
| Bluetooth | 5.4 | 6.0 |
| NFC | Yes | Yes |
| USB | USB-C | USB-C 3.2 |
| eSIM | No | Yes |
Software
| Spec | Redmi K90 | Xiaomi 15 Ultra |
|---|---|---|
| OS at launch | Android 16 (HyperOS 3) | Android 15 (HyperOS 2) |
| OS update pledge | — | 4 years |
Audio
| Spec | Redmi K90 | Xiaomi 15 Ultra |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | No | No |