Samsung Galaxy S21 vs Xiaomi 15
34.4Performance76.7
49.1Display64.5
40.8Camera64.7
36.9Battery83.5
78.7Features78.7
3 spec wins — Samsung Galaxy S2117 spec wins — Xiaomi 15
InnoReviews verdict
Xiaomi 15 wins this phone face-off, 73.4 to 43.6, pulling ahead mainly in battery (+47) and performance (+42). Samsung Galaxy S21 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
- 28% higher telephoto: 64 MP vs 50 MP
- 10% lower weight: 171 g vs 191 g
Reasons to pick the Xiaomi 15
- Stronger performance score: 77 vs 34
- Stronger display score: 65 vs 49
- Stronger camera score: 65 vs 41
- Stronger battery score: 84 vs 37
- 737% higher AnTuTu 11 (GPU): 1,069,991 vs 127,819
Display
| Spec | Samsung Galaxy S21 | Xiaomi 15 |
|---|---|---|
| Screen size | 6.2 ″ | 6.36 ″+3% |
| Panel type | AMOLED | LTPO AMOLED |
| Resolution | 2400x1080 | 1200x2670 |
| Pixel density | 421 ppi | 460 ppi+9% |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 1,300 nits | 3,200 nits+146% |
Performance
| Spec | Samsung Galaxy S21 | Xiaomi 15 |
|---|---|---|
| Chipset | Samsung Exynos 2100 | Snapdragon 8 Elite |
| AnTuTu 11 | 746,547Bottom 18% | 2,914,100+290%Top 17% |
| AnTuTu 11 (CPU) | 252,025Bottom 14% | 874,340+247%Top 14% |
| AnTuTu 11 (GPU) | 127,819Bottom 35% | 1,069,991+737%Top 17% |
| AnTuTu 11 (Memory) | 144,909Bottom 16% | 379,667+162%Top 20% |
| AnTuTu 11 (UX) | 221,794Bottom 18% | 590,102+166%Top 20% |
| Geekbench 6 (single) | 1,430Top 46% | 2,972+108%Top 15% |
| Geekbench 6 (multi) | 3,550Bottom 50% | 9,330+163%Top 12% |
| Wild Life Extreme stability | — | 89 %Top 50% |
| RAM (max) | 8 GB | 12 GB+50% |
| Storage options | 128GB / 256GB | 256/512GB |
| Storage type | UFS 3.1 | UFS 4.0 |
Camera
| Spec | Samsung Galaxy S21 | Xiaomi 15 |
|---|---|---|
| Main camera | 12 MP | 50 MP+317% |
| Main aperture | f/1.8 | f/1.62 |
| Ultra-wide | 12 MP | 50 MP+317% |
| Telephoto | 64 MP+28% | 50 MP |
| Optical zoom | — | 2.6 x |
| Max video | 8K@24fps | 8K@30fps |
| Front camera | 10 MP | 32 MP+220% |
| OIS | Yes | Yes |
Battery
| Spec | Samsung Galaxy S21 | Xiaomi 15 |
|---|---|---|
| Capacity | 4,000 mAh | 5,240 mAh+31% |
| Wired charging | 25 W | 90 W+260% |
| Wireless charging | 15 W | 50 W+233% |
| Active use endurance | — | 16.5 h |
Design
| Spec | Samsung Galaxy S21 | Xiaomi 15 |
|---|---|---|
| Weight | 171 g+10% | 191 g |
| Thickness | 7.9 mm+2% | 8.1 mm |
| IP rating | IP68 | IP68 |
| Frame material | Aluminum | Aluminum |
Connectivity
| Spec | Samsung Galaxy S21 | Xiaomi 15 |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 6 | Wi-Fi 7 |
| Bluetooth | 5.0 | 6.0 |
| NFC | Yes | Yes |
| USB | USB-C 3.2 | USB-C 3.2 |
| eSIM | Yes | Yes |
Software
| Spec | Samsung Galaxy S21 | Xiaomi 15 |
|---|---|---|
| OS at launch | Android 11 (One UI 3.1) | Android 15 (HyperOS 2) |
| OS update pledge | 4 years | 4 years |
Audio
| Spec | Samsung Galaxy S21 | Xiaomi 15 |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | No | No |