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 (3,740,528 vs 597,974); the Vivo X51 5G is noticeably lighter (181g vs 215g).
Vivo iQOO 15
Vivo X51 5G
- Higher AnTuTu: 3740528 vs 597974
- Better Geekbench Single: 3041 vs 799
- Better Geekbench Multi: 9494 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)
- Lighter: 181g vs 215g
- Better portability (70/100 vs 48/100)
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).
| Specification | Vivo iQOO 15 | Vivo X51 5G | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 765G | |
| AnTuTu | 3740528 | 597974 | |
| Geekbench Single | 3041 | 799 | |
| Geekbench Multi | 9494 | 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 | — |
Vivo iQOO 15
- Main: 50MP f/f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Vivo X51 5G
- Main: 48MP f/f/1.6
- Ultrawide: 8MP
- Telephoto: 8MP
- Front: 32MP
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
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
We compared Vivo iQOO 15 and Vivo X51 5G, covering their specs and all relevant benchmarks.
Vivo iQOO 15 leads Vivo X51 5G by 525.5% in our overall performance rating.
Vivo X51 5G
Price unknownperformance
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).
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. The Vivo X51 5G is a better fit for everyday use.