POCO X8 Power vs Samsung Galaxy S21 Ultra
28.9Performance37.2
66.5Display56.3
45.9Camera72
83.2Battery46.4
70.7Features78.7
5 spec wins — POCO X8 Power7 spec wins — Samsung Galaxy S21 Ultra
InnoReviews verdict
This one is close to a dead heat: POCO X8 Power scores 54.9 against 53.9 for Samsung Galaxy S21 Ultra. Pick by the categories that matter to you — POCO X8 Power edges ahead in battery and display, or by price.
Which would you pick?
Key differences
Reasons to pick the POCO X8 Power
- Stronger display score: 67 vs 56
- Stronger battery score: 83 vs 46
- 300% higher Wired charging: 100 W vs 25 W
- 133% higher Peak brightness: 3,500 nits vs 1,500 nits
- 100% higher capacity: 10,000 mAh vs 5,000 mAh
Reasons to pick the Samsung Galaxy S21 Ultra
- Stronger performance score: 37 vs 29
- Stronger camera score: 72 vs 46
- Stronger features score: 79 vs 71
- 116% higher Main camera: 108 MP vs 50 MP
- 50% higher RAM (max): 12 GB vs 8 GB
Display
| Spec | POCO X8 Power | Samsung Galaxy S21 Ultra |
|---|---|---|
| Screen size | 6.83 ″ | 6.8 ″ |
| Panel type | AMOLED | LTPO AMOLED |
| Resolution | 1280x2772 | 3200x1440 |
| Pixel density | 447 ppi | 515 ppi+15% |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 3,500 nits+133% | 1,500 nits |
| Screen-to-body | 89.5 % | — |
Performance
| Spec | POCO X8 Power | Samsung Galaxy S21 Ultra |
|---|---|---|
| Chipset | Snapdragon 6 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) | 8 GB | 12 GB+50% |
| Storage options | 128/256GB | 128GB / 256GB / 512GB |
| Storage type | UFS 2.2 | UFS 3.1 |
Camera
| Spec | POCO X8 Power | Samsung Galaxy S21 Ultra |
|---|---|---|
| Main camera | 50 MP | 108 MP+116% |
| Main aperture | f/1.5 | f/1.8 |
| Ultra-wide | 8 MP | 12 MP+50% |
| Telephoto | — | 10 MP |
| Optical zoom | — | 10 x |
| Max video | 4K@30fps | 8K@24fps |
| Front camera | 32 MP | 40 MP+25% |
| OIS | Yes | Yes |
Battery
| Spec | POCO X8 Power | Samsung Galaxy S21 Ultra |
|---|---|---|
| Capacity | 10,000 mAh+100% | 5,000 mAh |
| Wired charging | 100 W+300% | 25 W |
| Wireless charging | — | 15 W |
Design
| Spec | POCO X8 Power | Samsung Galaxy S21 Ultra |
|---|---|---|
| Weight | 229 g | 228 g |
| Thickness | 8.6 mm+3% | 8.9 mm |
| IP rating | IP68/IP69K | IP68 |
| Frame material | Plastic | Aluminum |
Connectivity
| Spec | POCO X8 Power | Samsung Galaxy S21 Ultra |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | — | Wi-Fi 6E |
| Bluetooth | 6.0 | 5.2 |
| NFC | No | Yes |
| USB | USB-C 2.0 | USB-C 3.2 |
| eSIM | Yes | Yes |
Software
| Spec | POCO X8 Power | 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 X8 Power | Samsung Galaxy S21 Ultra |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | No | No |
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