Samsung Galaxy S21 vs Vivo iQOO 15
The Samsung Galaxy S21 (2021) runs on the Samsung Exynos 2100, while the Vivo iQOO 15 (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $799 and $599. By overall MobileRank rating, the Vivo iQOO 15 leads — 86/100 vs 55/100 (a 31-point difference). Key differences: the Vivo iQOO 15 has the bigger battery (7000 mAh vs 4000); the main camera is 12 MP vs 50 MP; the Vivo iQOO 15 is faster in AnTuTu (3,758,268 vs 1,081,778); the Samsung Galaxy S21 is noticeably lighter (169g vs 215g).
Profile comparison
Category scores
Samsung Galaxy S21
Vivo iQOO 15
What makes Samsung Galaxy S21 better?
- Lighter: 169g vs 215g
- Better portability (79/100 vs 48/100)
What makes Vivo iQOO 15 better?
- Higher AnTuTu: 3758268 vs 1081778
- Better Geekbench Single: 3013 vs 1435
- Better Geekbench Multi: 9287 vs 3555
- Bigger battery: 7000 vs 4000 mAh
- Faster charging: 100W vs 25W
- Better main camera: 50MP vs 12MP
- Higher refresh rate: 144Hz vs 120Hz
- Faster wireless charging: 40W vs 15W
- Cheaper at launch: $599 vs $799
- Higher performance (94/100 vs 63/100)
- Better camera (78/100 vs 42/100)
- Longer battery life (85/100 vs 31/100)
- Better display (99/100 vs 82/100)
Comparison verdict
Comparing the Samsung Galaxy S21 vs the Vivo iQOO 15, the Vivo iQOO 15 scores 31 points higher (86/100 vs 55/100). In the "performance" category, the Vivo iQOO 15 leads (94/100 vs 63/100). In the "camera" category, the Vivo iQOO 15 leads (78/100 vs 42/100). In the "battery" category, the Vivo iQOO 15 leads (85/100 vs 31/100). Value score: Samsung Galaxy S21 — 24/100, Vivo iQOO 15 — 86/100; it shows how far a model sits above or below the usual level for its price, and is not part of the overall rating. In the "performance" category, the Vivo iQOO 15 significantly outperforms the Samsung Galaxy S21 (94/100 vs 63/100). In the "display" category, the Vivo iQOO 15 notably outperforms the Samsung Galaxy S21 (99/100 vs 82/100). In the "camera" category, the Vivo iQOO 15 significantly outperforms the Samsung Galaxy S21 (78/100 vs 42/100). In the "battery" category, the Vivo iQOO 15 significantly outperforms the Samsung Galaxy S21 (85/100 vs 31/100). In the "portability" category, the Samsung Galaxy S21 significantly outperforms the Vivo iQOO 15 (79/100 vs 48/100).
Specs comparison
| Specification | Samsung Galaxy S21 | Vivo iQOO 15 | |
|---|---|---|---|
| Processor | Samsung Exynos 2100 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 1081778 | 3758268 | |
| Geekbench Single | 1435 | 3013 | |
| Geekbench Multi | 3555 | 9287 | |
| Display | 6.2" AMOLED | 6.8" LTPO AMOLED | |
| Resolution | 1080x2400 | 1440x3168 | |
| Refresh rate | 120 Hz | 144 Hz | |
| Battery | 4000 mAh | 7000 mAh | |
| Charging | 25W | 100W | |
| Wireless charging | 15W | 40W | |
| Main camera | 12 MP | 50 MP | |
| Ultrawide | 12 MP | 50 MP | |
| Telephoto | 64 MP | 50 MP | |
| Front camera | 10 MP | 32 MP | |
| RAM | 8GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 11, One UI 3.1 | Android 16 | |
| Brightness (peak) | 1300 nits | 6000 nits | |
| NFC | yes | yes | |
| Protection | IP68 | IP68 | |
| Dimensions | 161.5×75.6×7.8 mm | 163.7×76.8×8.1 mm | |
| Weight | 169 g | 215 g | |
| Launch price | $799 | $599 |
Camera comparison
Samsung Galaxy S21
- Main: 12MP f/1.8
- Ultrawide: 12MP
- Telephoto: 64MP
- Front: 10MP
Vivo iQOO 15
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
Samsung Galaxy S21
- 6.2" AMOLED
- Resolution: 1080x2400
- Refresh rate: 120 Hz
Vivo iQOO 15
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Battery and charging
Samsung Galaxy S21
- 4000 mAh
- Wired: 25W
- Wireless: 15W
Vivo iQOO 15
- 7000 mAh
- NanoReview test: web browsing 18:52 hrs, total 39:26 hrs
- Wired: 100W
- Wireless: 40W
Overall performance score
We compared Samsung Galaxy S21 and Vivo iQOO 15, covering their specs and all relevant benchmarks.
Vivo iQOO 15 leads Samsung Galaxy S21 by 71.2% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $200. Vivo iQOO 15 was $200 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo iQOO 15 significantly outperforms the Samsung Galaxy S21 (94/100 vs 63/100).
display
In the "display" category, the Vivo iQOO 15 notably outperforms the Samsung Galaxy S21 (99/100 vs 82/100).
camera
In the "camera" category, the Vivo iQOO 15 significantly outperforms the Samsung Galaxy S21 (78/100 vs 42/100).
battery
In the "battery" category, the Vivo iQOO 15 significantly outperforms the Samsung Galaxy S21 (85/100 vs 31/100).
portability
In the "portability" category, the Samsung Galaxy S21 significantly outperforms the Vivo iQOO 15 (79/100 vs 48/100).
Frequently asked questions
Which is better: the Samsung Galaxy S21 or the Vivo iQOO 15?
The Vivo iQOO 15 significantly outperforms the Samsung Galaxy S21 by 31 points (86/100 vs 55/100).
What is the rating of the Samsung Galaxy S21 and the Vivo iQOO 15?
The Samsung Galaxy S21 has a MobileRank rating of 55/100, the Vivo iQOO 15 — 86/100.
Which has the better camera: the Samsung Galaxy S21 or the Vivo iQOO 15?
The Vivo iQOO 15 leads on camera score (78/100 vs 42/100).
Which is more powerful: the Samsung Galaxy S21 or the Vivo iQOO 15?
The Vivo iQOO 15 leads on performance (94/100 vs 63/100).
Should you choose the Samsung Galaxy S21 over the Vivo iQOO 15?
The Samsung Galaxy S21 is a better fit for active users. The Vivo iQOO 15 is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.