Vivo iQOO 15 vs Vivo X51 5G
The Vivo iQOO 15 (2025) runs on the Qualcomm Snapdragon 8 Elite, while the Vivo X51 5G (2020) runs on the Qualcomm Snapdragon 765G. By overall MobileRank rating, the Vivo iQOO 15 leads — 86/100 vs 46/100 (a 40-point difference). Key differences: the Vivo iQOO 15 has the bigger battery (7000 mAh vs 4315); the main camera is 50 MP vs 48 MP; the Vivo iQOO 15 is faster in AnTuTu (3,758,268 vs 597,974); the Vivo X51 5G is noticeably lighter (181g vs 215g).
Profile comparison
Category scores
Vivo iQOO 15
Vivo X51 5G
What makes Vivo iQOO 15 better?
- Higher AnTuTu: 3758268 vs 597974
- Better Geekbench Single: 3013 vs 799
- Better Geekbench Multi: 9287 vs 1836
- Bigger battery: 7000 vs 4315 mAh
- Faster charging: 100W vs 33W
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 144Hz vs 90Hz
- Higher performance (94/100 vs 44/100)
- Better camera (78/100 vs 42/100)
- Longer battery life (85/100 vs 31/100)
- Better display (99/100 vs 68/100)
What makes Vivo X51 5G better?
- Lighter: 181g vs 215g
- Better portability (70/100 vs 48/100)
Comparison verdict
Comparing the Vivo iQOO 15 vs the Vivo X51 5G, the Vivo iQOO 15 scores 40 points higher (86/100 vs 46/100). In the "performance" category, the Vivo iQOO 15 leads (94/100 vs 44/100). 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). In the "performance" category, the Vivo iQOO 15 significantly outperforms the Vivo X51 5G (94/100 vs 44/100). In the "display" category, the Vivo iQOO 15 significantly outperforms the Vivo X51 5G (99/100 vs 68/100). In the "camera" category, the Vivo iQOO 15 significantly outperforms the Vivo X51 5G (78/100 vs 42/100). In the "battery" category, the Vivo iQOO 15 significantly outperforms the Vivo X51 5G (85/100 vs 31/100). In the "portability" category, the Vivo X51 5G notably outperforms the Vivo iQOO 15 (70/100 vs 48/100).
Specs comparison
| Specification | Vivo iQOO 15 | Vivo X51 5G | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 765G | |
| AnTuTu | 3758268 | 597974 | |
| Geekbench Single | 3013 | 799 | |
| Geekbench Multi | 9287 | 1836 | |
| Display | 6.8" LTPO AMOLED | 6.6" AMOLED | |
| Resolution | 1440x3168 | 1080x2376 | |
| Refresh rate | 144 Hz | 90 Hz | |
| Battery | 7000 mAh | 4315 mAh | |
| Charging | 100W | 33W | |
| Wireless charging | 40W | 0W | |
| Main camera | 50 MP | 48 MP | |
| Ultrawide | 50 MP | 8 MP | |
| Telephoto | 50 MP | 8 MP | |
| Front camera | 32 MP | 32 MP | |
| RAM | 12GB / 16GB | 8GB | |
| Storage | 256GB / 512GB / 1TB | 256GB | |
| OS | Android 16 | Android 10, Funtouch 10.0 | |
| Brightness (peak) | 6000 nits | — | |
| NFC | yes | yes | |
| Protection | IP68 | — | |
| Dimensions | 163.7×76.8×8.1 mm | 158.5×72.8×8.0 mm | |
| Weight | 215 g | 181 g | |
| Launch price | $599 | — |
Camera comparison
Vivo iQOO 15
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Vivo X51 5G
- Main: 48MP f/1.6
- Ultrawide: 8MP
- Telephoto: 8MP
- Front: 32MP
Display comparison
Vivo iQOO 15
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Vivo X51 5G
- 6.6" AMOLED
- Resolution: 1080x2376
- Refresh rate: 90 Hz
Battery and charging
Vivo iQOO 15
- 7000 mAh
- NanoReview test: web browsing 18:52 hrs, total 39:26 hrs
- Wired: 100W
- Wireless: 40W
Vivo X51 5G
- 4315 mAh
- Wired: 33W
- No wireless charging
Overall performance score
We compared Vivo iQOO 15 and Vivo X51 5G, covering their specs and all relevant benchmarks.
Vivo iQOO 15 leads Vivo X51 5G by 528.5% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Vivo X51 5G
Price unknownDetailed category analysis
performance
In the "performance" category, the Vivo iQOO 15 significantly outperforms the Vivo X51 5G (94/100 vs 44/100).
display
In the "display" category, the Vivo iQOO 15 significantly outperforms the Vivo X51 5G (99/100 vs 68/100).
camera
In the "camera" category, the Vivo iQOO 15 significantly outperforms the Vivo X51 5G (78/100 vs 42/100).
battery
In the "battery" category, the Vivo iQOO 15 significantly outperforms the Vivo X51 5G (85/100 vs 31/100).
portability
In the "portability" category, the Vivo X51 5G notably outperforms the Vivo iQOO 15 (70/100 vs 48/100).
Frequently asked questions
Which is better: the Vivo iQOO 15 or the Vivo X51 5G?
The Vivo iQOO 15 significantly outperforms the Vivo X51 5G by 40 points (86/100 vs 46/100).
What is the rating of the Vivo iQOO 15 and the Vivo X51 5G?
The Vivo iQOO 15 has a MobileRank rating of 86/100, the Vivo X51 5G — 46/100.
Which has the better camera: the Vivo iQOO 15 or the Vivo X51 5G?
The Vivo iQOO 15 leads on camera score (78/100 vs 42/100).
Which is more powerful: the Vivo iQOO 15 or the Vivo X51 5G?
The Vivo iQOO 15 leads on performance (94/100 vs 44/100).
Should you choose the Vivo iQOO 15 over the Vivo X51 5G?
The Vivo iQOO 15 is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.