POCO M8x 5G vs Xiaomi 15 Ultra
20Performance79.1
50.5Display69.1
29Camera73.2
71.3Battery79
62.7Features78.7
4 spec wins — POCO M8x 5G6 spec wins — Xiaomi 15 Ultra
InnoReviews verdict
Xiaomi 15 Ultra wins this phone face-off, 75.9 to 42.4, pulling ahead mainly in performance (+59) and camera (+44). POCO M8x 5G still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the POCO M8x 5G
- 46% higher capacity: 7,900 mAh vs 5,410 mAh
- Has 3.5mm jack — the other doesn't
- Lower launch price: $170 vs $1,499
Reasons to pick the Xiaomi 15 Ultra
- Stronger performance score: 79 vs 20
- Stronger display score: 69 vs 51
- Stronger camera score: 73 vs 29
- Stronger battery score: 79 vs 71
- Stronger features score: 79 vs 63
Display
| Spec | POCO M8x 5G | Xiaomi 15 Ultra |
|---|---|---|
| Screen size | 6.9 ″+3% | 6.73 ″ |
| Panel type | LCD | LTPO AMOLED |
| Resolution | 720x1600 | 1440x3200 |
| Pixel density | 254 ppi | 522 ppi+106% |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | — | 3,200 nits |
| Screen-to-body | — | 90 % |
Performance
| Spec | POCO M8x 5G | Xiaomi 15 Ultra |
|---|---|---|
| Chipset | Qualcomm Snapdragon 4 Gen 5 | Snapdragon 8 Elite |
| AnTuTu | — | 2,650,000 |
| Geekbench 6 (single) | — | 3,050Top 13% |
| Geekbench 6 (multi) | — | 9,600Top 11% |
| RAM (max) | 6 GB | 16 GB+167% |
| Storage options | 128GB | 256/512GB/1TB |
| Storage type | UFS 2.2 | UFS 4.1 |
Camera
| Spec | POCO M8x 5G | Xiaomi 15 Ultra |
|---|---|---|
| Main camera | 50 MP | 50 MP |
| Main aperture | f/1.8 | f/1.63 |
| Ultra-wide | — | 50 MP |
| Telephoto | — | 200 MP |
| Optical zoom | — | 4.3 x |
| Max video | — | 8K@30fps |
| Front camera | 8 MP | 32 MP+300% |
| OIS | — | Yes |
Battery
| Spec | POCO M8x 5G | Xiaomi 15 Ultra |
|---|---|---|
| Capacity | 7,900 mAh+46% | 5,410 mAh |
| Wired charging | 45 W | 90 W+100% |
| Wireless charging | 0 W | 80 W |
| Active use endurance | — | 12 h |
Design
| Spec | POCO M8x 5G | Xiaomi 15 Ultra |
|---|---|---|
| Weight | 232 g | 226 g+3% |
| Thickness | 8.8 mm+6% | 9.4 mm |
| IP rating | IP64 | IP68 |
| Frame material | — | Aluminum |
Connectivity
| Spec | POCO M8x 5G | Xiaomi 15 Ultra |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | — | Wi-Fi 7 |
| Bluetooth | 5.1 | 6.0 |
| NFC | — | Yes |
| USB | — | USB-C 3.2 |
| eSIM | — | Yes |
Software
| Spec | POCO M8x 5G | Xiaomi 15 Ultra |
|---|---|---|
| OS at launch | Android 16 (HyperOS 3) | Android 15 (HyperOS 2) |
| OS update pledge | 4 years | 4 years |
Audio
| Spec | POCO M8x 5G | Xiaomi 15 Ultra |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | Yes | No |