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 — 89/100 vs 46/100 (a 43-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).
Profile comparison
Category scores
Vivo iQOO 15 Ultra
Vivo X51 5G
What makes Vivo iQOO 15 Ultra better?
- Higher AnTuTu: 4602290 vs 597974
- Better Geekbench Single: 3639 vs 799
- Better Geekbench Multi: 11047 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 (99/100 vs 44/100)
- Better camera (78/100 vs 42/100)
- Longer battery life (92/100 vs 31/100)
- Better display (99/100 vs 68/100)
What makes Vivo X51 5G better?
- Lighter: 181g vs 227g
- Better portability (70/100 vs 35/100)
Comparison verdict
Comparing the Vivo iQOO 15 Ultra vs the Vivo X51 5G, the Vivo iQOO 15 Ultra scores 43 points higher (89/100 vs 46/100). In the "performance" category, the Vivo iQOO 15 Ultra leads (99/100 vs 44/100). In the "camera" category, the Vivo iQOO 15 Ultra leads (78/100 vs 42/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (92/100 vs 31/100). In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (99/100 vs 44/100). In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (99/100 vs 68/100). In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (78/100 vs 42/100). In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (92/100 vs 31/100). In the "portability" category, the Vivo X51 5G significantly outperforms the Vivo iQOO 15 Ultra (70/100 vs 35/100).
Specs comparison
| Specification | Vivo iQOO 15 Ultra | Vivo X51 5G | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite Gen 5 | Qualcomm Snapdragon 765G | |
| AnTuTu | 4602290 | 597974 | |
| Geekbench Single | 3639 | 799 | |
| Geekbench Multi | 11047 | 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 | |
| Launch price | $799 | — |
Camera comparison
Vivo iQOO 15 Ultra
- 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 Ultra
- 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 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Vivo X51 5G
- 4315 mAh
- Wired: 33W
- No wireless charging
Overall performance score
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.
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 Ultra significantly outperforms the Vivo X51 5G (99/100 vs 44/100).
display
In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (99/100 vs 68/100).
camera
In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (78/100 vs 42/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Vivo X51 5G (92/100 vs 31/100).
portability
In the "portability" category, the Vivo X51 5G significantly outperforms the Vivo iQOO 15 Ultra (70/100 vs 35/100).
Frequently asked questions
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 43 points (89/100 vs 46/100).
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 89/100, the Vivo X51 5G — 46/100.
Which has the better camera: the Vivo iQOO 15 Ultra or the Vivo X51 5G?
The Vivo iQOO 15 Ultra leads on camera score (78/100 vs 42/100).
Which is more powerful: the Vivo iQOO 15 Ultra or the Vivo X51 5G?
The Vivo iQOO 15 Ultra leads on performance (99/100 vs 44/100).
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, budget-conscious buyers.