Samsung Galaxy S21 Ultra vs Vivo iQOO 15 Ultra
The Samsung Galaxy S21 Ultra (2021) runs on the Samsung Exynos 2100, while the Vivo iQOO 15 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5; launch prices were $1199 and $799. By overall MobileRank rating, the Vivo iQOO 15 Ultra leads — 89/100 vs 61/100 (a 28-point difference). Key differences: the Vivo iQOO 15 Ultra has the bigger battery (7400 mAh vs 5000); the main camera is 108 MP vs 50 MP; the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 1,074,182).
Samsung Galaxy S21 Ultra
Vivo iQOO 15 Ultra
- Better main camera: 108MP vs 50MP
- Overall rating 61/100
- Higher AnTuTu: 4602290 vs 1074182
- Better Geekbench Single: 3640 vs 1435
- Better Geekbench Multi: 11033 vs 3555
- Bigger battery: 7400 vs 5000 mAh
- Faster charging: 120W vs 25W
- Higher refresh rate: 144Hz vs 120Hz
- Faster wireless charging: 50W vs 15W
- Lighter: 227g vs 228g
- Cheaper at launch: $799 vs $1199
- Higher performance (99/100 vs 63/100)
- Better camera (78/100 vs 55/100)
- Longer battery life (92/100 vs 52/100)
- Better display (99/100 vs 89/100)
- Better portability (35/100 vs 33/100)
Comparing the Samsung Galaxy S21 Ultra vs the Vivo iQOO 15 Ultra, the Vivo iQOO 15 Ultra scores 28 points higher (89/100 vs 61/100). In the "performance" category, the Vivo iQOO 15 Ultra leads (99/100 vs 63/100). In the "camera" category, the Vivo iQOO 15 Ultra leads (78/100 vs 55/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (92/100 vs 52/100). Value score: Samsung Galaxy S21 Ultra — 32/100, Vivo iQOO 15 Ultra — 90/100; it is biased by price level, so it should not be compared directly between devices at different prices. In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Samsung Galaxy S21 Ultra (99/100 vs 63/100). In the "display" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 89/100). In the "camera" category, the Vivo iQOO 15 Ultra notably outperforms the Samsung Galaxy S21 Ultra (78/100 vs 55/100). In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Samsung Galaxy S21 Ultra (92/100 vs 52/100). In the "portability" category, the Vivo iQOO 15 Ultra and the Samsung Galaxy S21 Ultra are nearly equal (35/100 vs 33/100).
| Specification | Samsung Galaxy S21 Ultra | Vivo iQOO 15 Ultra | |
|---|---|---|---|
| Processor | Samsung Exynos 2100 | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 1074182 | 4602290 | |
| Geekbench Single | 1435 | 3640 | |
| Geekbench Multi | 3555 | 11033 | |
| Display | 6.8" AMOLED | 6.8" LTPO AMOLED | |
| Resolution | 3200x1440 | 1440x3168 | |
| Refresh rate | 120 Hz | 144 Hz | |
| Battery | 5000 mAh | 7400 mAh | |
| Charging | 25W | 120W | |
| Wireless charging | 15W | 50W | |
| DXOMark (camera) | 117 | — | |
| Main camera | 108 MP | 50 MP | |
| Ultrawide | 12 MP | 50 MP | |
| Telephoto | 10 MP | 50 MP | |
| Front camera | 40 MP | 32 MP | |
| RAM | 12GB / 16GB | 12GB / 16GB / 24GB | |
| Storage | 128GB / 256GB / 512GB | 256GB / 512GB / 1TB | |
| OS | Android 11 | Android 16 | |
| Brightness (peak) | 1500 nits | 8000 nits | |
| NFC | yes | yes | |
| Protection | IP68 | IP68 | |
| Dimensions | 165.1×75.6×8.9 mm | 163.7×76.8×8.7 mm | |
| Weight | 228 g | 227 g | |
| Launch price | $1199 | $799 |
Samsung Galaxy S21 Ultra
- Main: 108MP f/1.8
- Ultrawide: 12MP
- Telephoto: 10MP
- Front: 40MP
Vivo iQOO 15 Ultra
- Main: 50MP f/f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Samsung Galaxy S21 Ultra
- 6.8" AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Samsung Galaxy S21 Ultra
- 5000 mAh
- Wired: 25W
- Wireless: 15W
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
We compared Samsung Galaxy S21 Ultra and Vivo iQOO 15 Ultra, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Samsung Galaxy S21 Ultra by 76.7% in our overall performance rating.
Launch price difference: $400. Vivo iQOO 15 Ultra was $400 cheaper at launch.
performance
In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Samsung Galaxy S21 Ultra (99/100 vs 63/100).
display
In the "display" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 89/100).
camera
In the "camera" category, the Vivo iQOO 15 Ultra notably outperforms the Samsung Galaxy S21 Ultra (78/100 vs 55/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Samsung Galaxy S21 Ultra (92/100 vs 52/100).
portability
In the "portability" category, the Vivo iQOO 15 Ultra and the Samsung Galaxy S21 Ultra are nearly equal (35/100 vs 33/100).
Which is better: the Samsung Galaxy S21 Ultra or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra significantly outperforms the Samsung Galaxy S21 Ultra by 28 points (89/100 vs 61/100).
What is the rating of the Samsung Galaxy S21 Ultra and the Vivo iQOO 15 Ultra?
The Samsung Galaxy S21 Ultra has a MobileRank rating of 61/100, the Vivo iQOO 15 Ultra — 89/100.
Which has the better camera: the Samsung Galaxy S21 Ultra or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on camera score (78/100 vs 55/100).
Which is more powerful: the Samsung Galaxy S21 Ultra or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on performance (99/100 vs 63/100).
Should you choose the Samsung Galaxy S21 Ultra over the Vivo iQOO 15 Ultra?
The Samsung Galaxy S21 Ultra is a better fit for active users. The Vivo iQOO 15 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.