POCO M8x 5G vs Samsung Galaxy S21 Ultra
20Performance37.2
50.5Display56.3
29Camera72
71.3Battery46.4
62.7Features78.7
5 spec wins — POCO M8x 5G6 spec wins — Samsung Galaxy S21 Ultra
InnoReviews verdict
Samsung Galaxy S21 Ultra wins this phone face-off, 53.9 to 42.4, pulling ahead mainly in camera (+43) and performance (+17). 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
- Stronger battery score: 71 vs 46
- 80% higher Wired charging: 45 W vs 25 W
- 58% higher capacity: 7,900 mAh vs 5,000 mAh
- Has 3.5mm jack — the other doesn't
- Lower launch price: $170 vs $1,199
Reasons to pick the Samsung Galaxy S21 Ultra
- Stronger performance score: 37 vs 20
- Stronger display score: 56 vs 51
- Stronger camera score: 72 vs 29
- Stronger features score: 79 vs 63
- 400% higher Front camera: 40 MP vs 8 MP
Display
| Spec | POCO M8x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Screen size | 6.9 ″+1% | 6.8 ″ |
| Panel type | LCD | LTPO AMOLED |
| Resolution | 720x1600 | 3200x1440 |
| Pixel density | 254 ppi | 515 ppi+103% |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | — | 1,500 nits |
Performance
| Spec | POCO M8x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Chipset | Qualcomm Snapdragon 4 Gen 5 | Samsung Exynos 2100 |
| AnTuTu | — | 783,817Bottom 22% |
| AnTuTu 11 (CPU) | — | 263,424Bottom 17% |
| AnTuTu 11 (GPU) | — | 126,989Bottom 33% |
| AnTuTu 11 (Memory) | — | 165,563Bottom 35% |
| AnTuTu 11 (UX) | — | 227,841Bottom 20% |
| Geekbench 6 (single) | — | 1,430Top 46% |
| Geekbench 6 (multi) | — | 3,550Bottom 50% |
| RAM (max) | 6 GB | 12 GB+100% |
| Storage options | 128GB | 128GB / 256GB / 512GB |
| Storage type | UFS 2.2 | UFS 3.1 |
Camera
| Spec | POCO M8x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Main camera | 50 MP | 108 MP+116% |
| Main aperture | f/1.8 | f/1.8 |
| Ultra-wide | — | 12 MP |
| Telephoto | — | 10 MP |
| Optical zoom | — | 10 x |
| Max video | — | 8K@24fps |
| Front camera | 8 MP | 40 MP+400% |
| OIS | — | Yes |
Battery
| Spec | POCO M8x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Capacity | 7,900 mAh+58% | 5,000 mAh |
| Wired charging | 45 W+80% | 25 W |
| Wireless charging | 0 W | 15 W |
Design
| Spec | POCO M8x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Weight | 232 g | 228 g+2% |
| Thickness | 8.8 mm+1% | 8.9 mm |
| IP rating | IP64 | IP68 |
| Frame material | — | Aluminum |
Connectivity
| Spec | POCO M8x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | — | Wi-Fi 6E |
| Bluetooth | 5.1 | 5.2 |
| NFC | — | Yes |
| USB | — | USB-C 3.2 |
| eSIM | — | Yes |
Software
| Spec | POCO M8x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| OS at launch | Android 16 (HyperOS 3) | Android 11 (One UI 3.1) |
| OS update pledge | 4 years | 4 years |
Audio
| Spec | POCO M8x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | Yes | No |
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