Vivo iQOO 15 Ultra vs Vivo X51 5G
The Vivo iQOO 15 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5, while the Vivo X51 5G (2020) runs on the Qualcomm Snapdragon 765G. By overall MobileRank rating, the Vivo iQOO 15 Ultra leads — 84/100 vs 25/100 (a 59-point difference). Key differences: the Vivo iQOO 15 Ultra has the bigger battery (7400 mAh vs 4315); the main camera is 50 MP vs 48 MP; the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 597,974); the Vivo X51 5G is noticeably lighter (181g vs 227g).
Vivo iQOO 15 Ultra
Vivo X51 5G
- Higher AnTuTu: 4602290 vs 597974
- Better Geekbench Single: 3640 vs 799
- Better Geekbench Multi: 11033 vs 1836
- Bigger battery: 7400 vs 4315 mAh
- Faster charging: 120W vs 33W
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 144Hz vs 90Hz
- Higher performance (97/100 vs 0/100)
- Better camera (74/100 vs 38/100)
- Longer battery life (86/100 vs 22/100)
- Better display (100/100 vs 50/100)
- Lighter: 181g vs 227g
- Better design/ergonomics (73/100 vs 16/100)
Comparing the Vivo iQOO 15 Ultra vs the Vivo X51 5G, the Vivo iQOO 15 Ultra scores 59 points higher (84/100 vs 25/100). In the "performance" category, the Vivo iQOO 15 Ultra leads (97/100 vs 0/100). In the "camera" category, the Vivo iQOO 15 Ultra leads (74/100 vs 38/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (86/100 vs 22/100). In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (97/100 vs 0/100). In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (100/100 vs 50/100). In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (74/100 vs 38/100). In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (86/100 vs 22/100). In the "design" category, the Vivo X51 5G significantly outperforms the Vivo iQOO 15 Ultra (73/100 vs 16/100). In the "value for money" category, both devices are on the same level — 55/100.
| Specification | Vivo iQOO 15 Ultra | Vivo X51 5G | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite Gen 5 | Qualcomm Snapdragon 765G | |
| AnTuTu | 4602290 | 597974 | |
| Geekbench Single | 3640 | 799 | |
| Geekbench Multi | 11033 | 1836 | |
| Display | 6.8" LTPO AMOLED | 6.6" AMOLED | |
| Resolution | 1440x3168 | 1080x2376 | |
| Refresh rate | 144 Hz | 90 Hz | |
| Battery | 7400 mAh | 4315 mAh | |
| Charging | 120W | 33W | |
| Wireless charging | 50W | 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 / 24GB | 8GB | |
| Storage | 256GB / 512GB / 1TB | 256GB | |
| OS | Android 16 | Android 10, Funtouch 10.0 | |
| Brightness (peak) | 8000 nits | — | |
| NFC | yes | yes | |
| Protection | IP68 | — | |
| Dimensions | 163.7×76.8×8.7 mm | 158.5×72.8×8.0 mm | |
| Weight | 227 g | 181 g | |
| Price | $799 | — |
Vivo iQOO 15 Ultra
- 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 Ultra
- 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 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Vivo X51 5G
- 4315 mAh
- Wired: 33W
- No wireless charging
We compared Vivo iQOO 15 Ultra and Vivo X51 5G, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Vivo X51 5G by 669.6% in our overall performance rating.
Vivo X51 5G
Price unknownperformance
In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (97/100 vs 0/100).
display
In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (100/100 vs 50/100).
camera
In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (74/100 vs 38/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (86/100 vs 22/100).
design
In the "design" category, the Vivo X51 5G significantly outperforms the Vivo iQOO 15 Ultra (73/100 vs 16/100).
value for money
In the "value for money" category, both devices are on the same level — 55/100.
Which is better: the Vivo iQOO 15 Ultra or the Vivo X51 5G?
The Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G by 59 points (84/100 vs 25/100).
What is the rating of the Vivo iQOO 15 Ultra and the Vivo X51 5G?
The Vivo iQOO 15 Ultra has a MobileRank rating of 84/100, the Vivo X51 5G — 25/100.
Which has the better camera: the Vivo iQOO 15 Ultra or the Vivo X51 5G?
The Vivo iQOO 15 Ultra leads on camera score (74/100 vs 38/100).
Which is more powerful: the Vivo iQOO 15 Ultra or the Vivo X51 5G?
The Vivo iQOO 15 Ultra leads on performance (97/100 vs 0/100).
Should you choose the Vivo iQOO 15 Ultra over the Vivo X51 5G?
The Vivo iQOO 15 Ultra is a better fit for gamers and power users, those who care about battery life. The Vivo X51 5G is a better fit for everyday use.