Samsung Galaxy S21 Ultra vs Xiaomi 15T
37.2Performance43.5
56.3Display63.7
72Camera55.5
46.4Battery76.5
78.7Features100
4 spec wins — Samsung Galaxy S21 Ultra9 spec wins — Xiaomi 15T
InnoReviews verdict
Xiaomi 15T wins this phone face-off, 62.2 to 53.9, pulling ahead mainly in battery (+30) and features (+21). 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
- Stronger camera score: 72 vs 56
- 400% higher Optical zoom: 10 x vs 2 x
- 116% higher Main camera: 108 MP vs 50 MP
- 25% higher Front camera: 40 MP vs 32 MP
- 15% higher Pixel density: 515 ppi vs 447 ppi
Reasons to pick the Xiaomi 15T
- Stronger performance score: 44 vs 37
- Stronger display score: 64 vs 56
- Stronger battery score: 77 vs 46
- Stronger features score: 100 vs 79
- 400% higher telephoto: 50 MP vs 10 MP
Display
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15T |
|---|---|---|
| Screen size | 6.8 ″ | 6.83 ″ |
| Panel type | LTPO AMOLED | AMOLED |
| Resolution | 3200x1440 | 1280x2772 |
| Pixel density | 515 ppi+15% | 447 ppi |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 1,500 nits | 3,200 nits+113% |
Performance
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15T |
|---|---|---|
| Chipset | Samsung Exynos 2100 | MediaTek Dimensity 8400-Ultra |
| 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% | 1,632+14%Top 42% |
| Geekbench 6 (multi) | 3,550Bottom 50% | 6,505+83%Top 28% |
| RAM (max) | 12 GB | 12 GB |
| Storage options | 128GB / 256GB / 512GB | 256/512GB |
| Storage type | UFS 3.1 | UFS 4.1 |
Camera
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15T |
|---|---|---|
| Main camera | 108 MP+116% | 50 MP |
| Main aperture | f/1.8 | f/1.7 |
| Ultra-wide | 12 MP | 12 MP |
| Telephoto | 10 MP | 50 MP+400% |
| Optical zoom | 10 x+400% | 2 x |
| Max video | 8K@24fps | 4K@60fps |
| Front camera | 40 MP+25% | 32 MP |
| OIS | Yes | Yes |
Battery
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15T |
|---|---|---|
| Capacity | 5,000 mAh | 5,500 mAh+10% |
| Wired charging | 25 W | 67 W+168% |
| Wireless charging | 15 W | — |
| Active use endurance | — | 14.9 h |
Design
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15T |
|---|---|---|
| Weight | 228 g | 194 g+15% |
| Thickness | 8.9 mm | 7.5 mm+16% |
| IP rating | IP68 | IP68 |
| Frame material | Aluminum | Plastic |
Connectivity
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15T |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 6E | Wi-Fi 6E |
| Bluetooth | 5.2 | 6.0 |
| NFC | Yes | Yes |
| USB | USB-C 3.2 | USB-C |
| eSIM | Yes | Yes |
Software
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 15T |
|---|---|---|
| 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 15T |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | No | No |
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