Vivo iQOO 15 vs Vivo X21i
The Vivo iQOO 15 (2025) runs on the Qualcomm Snapdragon 8 Elite, while the Vivo X21i (2018) runs on the MediaTek Helio P60. By overall MobileRank rating, the Vivo iQOO 15 leads — 86/100 vs 30/100 (a 56-point difference). Key differences: the Vivo iQOO 15 has the bigger battery (7000 mAh vs 3425); the main camera is 50 MP vs 12 MP; the Vivo iQOO 15 is faster in AnTuTu (3,758,268 vs 314,537); the Vivo iQOO 15 has NFC for contactless payments, the Vivo X21i doesn't; the Vivo X21i is noticeably lighter (159g vs 215g).
Profile comparison
Category scores
Vivo iQOO 15
Vivo X21i
What makes Vivo iQOO 15 better?
- Higher AnTuTu: 3758268 vs 314537
- Better Geekbench Single: 3013 vs 341
- Better Geekbench Multi: 9287 vs 779
- Bigger battery: 7000 vs 3425 mAh
- Better main camera: 50MP vs 12MP
- Higher performance (94/100 vs 20/100)
- Better camera (78/100 vs 15/100)
- Longer battery life (85/100 vs 15/100)
- Better display (99/100 vs 82/100)
What makes Vivo X21i better?
- Lighter: 159g vs 215g
- Better portability (94/100 vs 48/100)
Comparison verdict
Comparing the Vivo iQOO 15 vs the Vivo X21i, the Vivo iQOO 15 scores 56 points higher (86/100 vs 30/100). In the "performance" category, the Vivo iQOO 15 leads (94/100 vs 20/100). In the "camera" category, the Vivo iQOO 15 leads (78/100 vs 15/100). In the "battery" category, the Vivo iQOO 15 leads (85/100 vs 15/100). In the "performance" category, the Vivo iQOO 15 significantly outperforms the Vivo X21i (94/100 vs 20/100). In the "display" category, the Vivo iQOO 15 notably outperforms the Vivo X21i (99/100 vs 82/100). In the "camera" category, the Vivo iQOO 15 significantly outperforms the Vivo X21i (78/100 vs 15/100). In the "battery" category, the Vivo iQOO 15 significantly outperforms the Vivo X21i (85/100 vs 15/100). In the "portability" category, the Vivo X21i significantly outperforms the Vivo iQOO 15 (94/100 vs 48/100).
Specs comparison
| Specification | Vivo iQOO 15 | Vivo X21i | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | MediaTek Helio P60 | |
| AnTuTu | 3758268 | 314537 | |
| Geekbench Single | 3013 | 341 | |
| Geekbench Multi | 9287 | 779 | |
| Display | 6.8" LTPO AMOLED | 6.3" Super AMOLED | |
| Resolution | 1440x3168 | 1080x2280 | |
| Refresh rate | 144 Hz | — | |
| Battery | 7000 mAh | 3425 mAh | |
| Charging | 100W | — | |
| Wireless charging | 40W | — | |
| Main camera | 50 MP | 12 MP | |
| Ultrawide | 50 MP | 0 MP | |
| Telephoto | 50 MP | 0 MP | |
| Front camera | 32 MP | 24 MP | |
| RAM | 12GB / 16GB | 4GB / 6GB | |
| Storage | 256GB / 512GB / 1TB | 64GB / 128GB | |
| OS | Android 16 | Android 8.1 (Oreo); Funtouch 4 | |
| Brightness (peak) | 6000 nits | — | |
| NFC | yes | no | |
| Protection | IP68 | — | |
| Dimensions | 163.7×76.8×8.1 mm | 154.4×75.0×7.0 mm | |
| Weight | 215 g | 159 g | |
| Launch price | $599 | — |
Camera comparison
Vivo iQOO 15
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Vivo X21i
- Main: 12MP f/1.8
- Front: 24MP
Display comparison
Vivo iQOO 15
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Vivo X21i
- 6.3" Super AMOLED
- Resolution: 1080x2280
- Refresh rate: —
Battery and charging
Vivo iQOO 15
- 7000 mAh
- NanoReview test: web browsing 18:52 hrs, total 39:26 hrs
- Wired: 100W
- Wireless: 40W
Vivo X21i
- 3425 mAh
- Wireless charging: no data
Overall performance score
We compared Vivo iQOO 15 and Vivo X21i, covering their specs and all relevant benchmarks.
Vivo iQOO 15 leads Vivo X21i by 1094.9% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Vivo X21i
Price unknownDetailed category analysis
performance
In the "performance" category, the Vivo iQOO 15 significantly outperforms the Vivo X21i (94/100 vs 20/100).
display
In the "display" category, the Vivo iQOO 15 notably outperforms the Vivo X21i (99/100 vs 82/100).
camera
In the "camera" category, the Vivo iQOO 15 significantly outperforms the Vivo X21i (78/100 vs 15/100).
battery
In the "battery" category, the Vivo iQOO 15 significantly outperforms the Vivo X21i (85/100 vs 15/100).
portability
In the "portability" category, the Vivo X21i significantly outperforms the Vivo iQOO 15 (94/100 vs 48/100).
Frequently asked questions
Which is better: the Vivo iQOO 15 or the Vivo X21i?
The Vivo iQOO 15 significantly outperforms the Vivo X21i by 56 points (86/100 vs 30/100).
What is the rating of the Vivo iQOO 15 and the Vivo X21i?
The Vivo iQOO 15 has a MobileRank rating of 86/100, the Vivo X21i — 30/100.
Which has the better camera: the Vivo iQOO 15 or the Vivo X21i?
The Vivo iQOO 15 leads on camera score (78/100 vs 15/100).
Which is more powerful: the Vivo iQOO 15 or the Vivo X21i?
The Vivo iQOO 15 leads on performance (94/100 vs 20/100).
Should you choose the Vivo iQOO 15 over the Vivo X21i?
The Vivo iQOO 15 is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.