Samsung Galaxy S21 vs Vivo iQOO 15 Ultra
The Samsung Galaxy S21 (2021) runs on the Samsung Exynos 2100, while the Vivo iQOO 15 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5; estimated prices are $799 and $799. By overall MobileRank rating, the Vivo iQOO 15 Ultra leads — 84/100 vs 24/100 (a 60-point difference). Key differences: the Vivo iQOO 15 Ultra has the bigger battery (7400 mAh vs 4000); the main camera is 12 MP vs 50 MP; the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 1,074,811); the Samsung Galaxy S21 is noticeably lighter (169g vs 227g).
Samsung Galaxy S21
Vivo iQOO 15 Ultra
- Lighter: 169g vs 227g
- Better design/ergonomics (88/100 vs 16/100)
- Higher AnTuTu: 4602290 vs 1074811
- Better Geekbench Single: 3640 vs 1435
- Better Geekbench Multi: 11033 vs 3555
- Bigger battery: 7400 vs 4000 mAh
- Better main camera: 50MP vs 12MP
- Higher refresh rate: 144Hz vs 120Hz
- Higher performance (97/100 vs 10/100)
- Better camera (74/100 vs 0/100)
- Longer battery life (86/100 vs 12/100)
Comparing the Samsung Galaxy S21 vs the Vivo iQOO 15 Ultra, the Vivo iQOO 15 Ultra scores 60 points higher (84/100 vs 24/100). In the "performance" category, the Vivo iQOO 15 Ultra leads (97/100 vs 10/100). In the "camera" category, the Vivo iQOO 15 Ultra leads (74/100 vs 0/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (86/100 vs 12/100). In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Samsung Galaxy S21 (97/100 vs 10/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Samsung Galaxy S21 (74/100 vs 0/100). In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Samsung Galaxy S21 (86/100 vs 12/100). In the "design" category, the Samsung Galaxy S21 significantly outperforms the Vivo iQOO 15 Ultra (88/100 vs 16/100). In the "value for money" category, both devices are on the same level — 55/100.
| Specification | Samsung Galaxy S21 | Vivo iQOO 15 Ultra | |
|---|---|---|---|
| Processor | Samsung Exynos 2100 | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 1074811 | 4602290 | |
| Geekbench Single | 1435 | 3640 | |
| Geekbench Multi | 3555 | 11033 | |
| Display | 6.2" AMOLED | 6.8" LTPO AMOLED | |
| Resolution | — | 1440x3168 | |
| Refresh rate | 120 Hz | 144 Hz | |
| Battery | 4000 mAh | 7400 mAh | |
| Charging | — | 120W | |
| Wireless charging | 0W | 50W | |
| Main camera | 12 MP | 50 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 10 MP | 32 MP | |
| RAM | 8GB | 12GB / 16GB / 24GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | — | Android 16 | |
| Brightness (peak) | — | 8000 nits | |
| NFC | — | yes | |
| Protection | — | IP68 | |
| Dimensions | — | 163.7×76.8×8.7 mm | |
| Weight | 169 g | 227 g | |
| Price | $799 | $799 |
Samsung Galaxy S21
- Main: 12MP
- Front: 10MP
Vivo iQOO 15 Ultra
- Main: 50MP f/f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Samsung Galaxy S21
- 6.2" AMOLED
- Refresh rate: 120 Hz
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Samsung Galaxy S21
- 4000 mAh
- No wireless charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
We compared Samsung Galaxy S21 and Vivo iQOO 15 Ultra, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Samsung Galaxy S21 by 76.6% in our overall performance rating.
Price difference: $0. Same price.
performance
In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Samsung Galaxy S21 (97/100 vs 10/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Samsung Galaxy S21 (74/100 vs 0/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Samsung Galaxy S21 (86/100 vs 12/100).
design
In the "design" category, the Samsung Galaxy S21 significantly outperforms the Vivo iQOO 15 Ultra (88/100 vs 16/100).
value for money
In the "value for money" category, both devices are on the same level — 55/100.
Which is better: the Samsung Galaxy S21 or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra significantly outperforms the Samsung Galaxy S21 by 60 points (84/100 vs 24/100).
What is the rating of the Samsung Galaxy S21 and the Vivo iQOO 15 Ultra?
The Samsung Galaxy S21 has a MobileRank rating of 24/100, the Vivo iQOO 15 Ultra — 84/100.
Which has the better camera: the Samsung Galaxy S21 or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on camera score (74/100 vs 0/100).
Which is more powerful: the Samsung Galaxy S21 or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on performance (97/100 vs 10/100).
Should you choose the Samsung Galaxy S21 over the Vivo iQOO 15 Ultra?
The Samsung Galaxy S21 is a better fit for everyday use. The Vivo iQOO 15 Ultra is a better fit for gamers and power users, those who care about battery life.