Samsung Galaxy S21 Ultra vs Xiaomi 17
37.2Performance87
56.3Display68.8
72Camera68.6
46.4Battery91
78.7Features84
4 spec wins — Samsung Galaxy S21 Ultra18 spec wins — Xiaomi 17
InnoReviews verdict
Xiaomi 17 wins this phone face-off, 80.2 to 53.9, pulling ahead mainly in performance (+50) and battery (+45). 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 69
- 285% higher Optical zoom: 10 x vs 2.6 x
- 116% higher Main camera: 108 MP vs 50 MP
- 11% higher Pixel density: 515 ppi vs 464 ppi
Reasons to pick the Xiaomi 17
- Stronger performance score: 87 vs 37
- Stronger display score: 69 vs 56
- Stronger battery score: 91 vs 46
- Stronger features score: 84 vs 79
- 838% higher AnTuTu 11 (GPU): 1,191,470 vs 126,989
Display
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 17 |
|---|---|---|
| Screen size | 6.8 ″+8% | 6.3 ″ |
| Panel type | LTPO AMOLED | LTPO AMOLED |
| Resolution | 3200x1440 | 1220x2656 |
| Pixel density | 515 ppi+11% | 464 ppi |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 1,500 nits | 3,500 nits+133% |
| Screen-to-body | — | 91.1 % |
Performance
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 17 |
|---|---|---|
| Chipset | Samsung Exynos 2100 | Snapdragon 8 Elite Gen 5 |
| AnTuTu 11 | 783,817Bottom 22% | 3,248,535+314%Top 9% |
| AnTuTu 11 (CPU) | 263,424Bottom 17% | 921,447+250%Top 9% |
| AnTuTu 11 (GPU) | 126,989Bottom 33% | 1,191,470+838%Top 11% |
| AnTuTu 11 (Memory) | 165,563Bottom 35% | 473,607+186%Top 5% |
| AnTuTu 11 (UX) | 227,841Bottom 20% | 662,011+191%Top 9% |
| Geekbench 6 (single) | 1,430Top 46% | 3,559+149%Top 5% |
| Geekbench 6 (multi) | 3,550Bottom 50% | 10,459+195%Top 6% |
| RAM (max) | 12 GB | 16 GB+33% |
| Storage options | 128GB / 256GB / 512GB | 256/512GB/1TB |
| Storage type | UFS 3.1 | UFS 4.1 |
Camera
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 17 |
|---|---|---|
| Main camera | 108 MP+116% | 50 MP |
| Main aperture | f/1.8 | f/1.67 |
| Ultra-wide | 12 MP | 50 MP+317% |
| Telephoto | 10 MP | 50 MP+400% |
| Optical zoom | 10 x+285% | 2.6 x |
| Max video | 8K@24fps | 8K@30fps |
| Front camera | 40 MP | 50 MP+25% |
| OIS | Yes | Yes |
Battery
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 17 |
|---|---|---|
| Capacity | 5,000 mAh | 6,330 mAh+27% |
| Wired charging | 25 W | 100 W+300% |
| Wireless charging | 15 W | 50 W+233% |
| Active use endurance | — | 21.3 h |
Design
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 17 |
|---|---|---|
| Weight | 228 g | 191 g+16% |
| Thickness | 8.9 mm | 8.1 mm+9% |
| IP rating | IP68 | IP68 |
| Frame material | Aluminum | Aluminum |
Connectivity
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 17 |
|---|---|---|
| 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 |
| eSIM | Yes | Yes |
Software
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 17 |
|---|---|---|
| OS at launch | Android 11 (One UI 3.1) | Android 16 (HyperOS 3) |
| OS update pledge | 4 years | 5 years+25% |
Audio
| Spec | Samsung Galaxy S21 Ultra | Xiaomi 17 |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | No | No |