Samsung Galaxy S21 Ultra vs Xiaomi 15S Pro
37.2Performance72.8
56.3Display69.1
72Camera69.5
46.4Battery82
78.7Features86.7
5 spec wins — Samsung Galaxy S21 Ultra12 spec wins — Xiaomi 15S Pro
InnoReviews verdict
Xiaomi 15S Pro wins this phone face-off, 74.6 to 53.9, pulling ahead mainly in battery (+36) and performance (+36). Samsung Galaxy S21 Ultra still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the Samsung Galaxy S21 Ultra
- 116% higher Main camera: 108 MP vs 50 MP
- 100% higher Optical zoom: 10 x vs 5 x
- 25% higher Front camera: 40 MP vs 32 MP
- Has eSIM — the other doesn't
Reasons to pick the Xiaomi 15S Pro
- Stronger performance score: 73 vs 37
- Stronger display score: 69 vs 56
- Stronger battery score: 82 vs 46
- Stronger features score: 87 vs 79
- 400% higher telephoto: 50 MP vs 10 MP
Display
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15S Pro |
|---|---|---|
| Screen size | 6.8 ″+1% | 6.73 ″ |
| Panel type | LTPO AMOLED | LTPO AMOLED |
| Resolution | 3200x1440 | 1440x3200 |
| Pixel density | 515 ppi | 521 ppi+1% |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 1,500 nits | 3,200 nits+113% |
| Screen-to-body | — | 90 % |
Performance
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15S Pro |
|---|---|---|
| Chipset | Samsung Exynos 2100 | Xiaomi XRing O1 |
| 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% | 2,985+109%Top 14% |
| Geekbench 6 (multi) | 3,550Bottom 50% | 9,250+161%Top 13% |
| Wild Life Extreme stability | — | 86 %Top 50% |
| RAM (max) | 12 GB | 16 GB+33% |
| Storage options | 128GB / 256GB / 512GB | 512GB/1TB |
| Storage type | UFS 3.1 | UFS 4.1 |
Camera
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15S Pro |
|---|---|---|
| Main camera | 108 MP+116% | 50 MP |
| Main aperture | f/1.8 | f/1.44 |
| Ultra-wide | 12 MP | 50 MP+317% |
| Telephoto | 10 MP | 50 MP+400% |
| Optical zoom | 10 x+100% | 5 x |
| Max video | 8K@24fps | 8K@24fps |
| Front camera | 40 MP+25% | 32 MP |
| OIS | Yes | Yes |
Battery
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15S Pro |
|---|---|---|
| Capacity | 5,000 mAh | 6,100 mAh+22% |
| Wired charging | 25 W | 90 W+260% |
| Wireless charging | 15 W | 50 W+233% |
Design
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15S Pro |
|---|---|---|
| Weight | 228 g | 216 g+5% |
| Thickness | 8.9 mm | 8.3 mm+6% |
| IP rating | IP68 | IP68 |
| Frame material | Aluminum | Aluminum |
Connectivity
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15S Pro |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 6E | Wi-Fi 7 |
| Bluetooth | 5.2 | 5.4 |
| NFC | Yes | Yes |
| USB | USB-C 3.2 | USB-C 3.2 Gen 2 |
| eSIM | Yes | No |
Software
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15S Pro |
|---|---|---|
| OS at launch | Android 11 (One UI 3.1) | Android 15 (HyperOS 2) |
| OS update pledge | 4 years | — |
Audio
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15S Pro |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | No | No |
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