Vivo iQOO 15 Ultra vs Xiaomi Mi 8
The Vivo iQOO 15 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5, while the Xiaomi Mi 8 (2018) runs on the Qualcomm Snapdragon 845; launch prices were $799 and $460. By overall MobileRank rating, the Vivo iQOO 15 Ultra leads — 89/100 vs 34/100 (a 55-point difference). Key differences: the Vivo iQOO 15 Ultra has the bigger battery (7400 mAh vs 3400); the main camera is 50 MP vs 12 MP; the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 595,284); the Xiaomi Mi 8 is noticeably lighter (175g vs 227g).
Vivo iQOO 15 Ultra
Xiaomi Mi 8
- Higher AnTuTu: 4602290 vs 595284
- Better Geekbench Single: 3640 vs 563
- Better Geekbench Multi: 11033 vs 2006
- Bigger battery: 7400 vs 3400 mAh
- Faster charging: 120W vs 18W
- Better main camera: 50MP vs 12MP
- Higher refresh rate: 144Hz vs 60Hz
- Higher performance (99/100 vs 41/100)
- Better camera (78/100 vs 19/100)
- Longer battery life (92/100 vs 12/100)
- Better display (99/100 vs 56/100)
- Lighter: 175g vs 227g
- Cheaper at launch: $460 vs $799
- Better portability (78/100 vs 35/100)
Comparing the Vivo iQOO 15 Ultra vs the Xiaomi Mi 8, the Vivo iQOO 15 Ultra scores 55 points higher (89/100 vs 34/100). In the "performance" category, the Vivo iQOO 15 Ultra leads (99/100 vs 41/100). In the "camera" category, the Vivo iQOO 15 Ultra leads (78/100 vs 19/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (92/100 vs 12/100). Value score: Vivo iQOO 15 Ultra — 90/100, Xiaomi Mi 8 — 0/100; it is biased by price level, so it should not be compared directly between devices at different prices. In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Xiaomi Mi 8 (99/100 vs 41/100). In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Xiaomi Mi 8 (99/100 vs 56/100). In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Xiaomi Mi 8 (78/100 vs 19/100). In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Xiaomi Mi 8 (92/100 vs 12/100). In the "portability" category, the Xiaomi Mi 8 significantly outperforms the Vivo iQOO 15 Ultra (78/100 vs 35/100).
| Specification | Vivo iQOO 15 Ultra | Xiaomi Mi 8 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite Gen 5 | Qualcomm Snapdragon 845 | |
| AnTuTu | 4602290 | 595284 | |
| Geekbench Single | 3640 | 563 | |
| Geekbench Multi | 11033 | 2006 | |
| Display | 6.8" LTPO AMOLED | 6.2" AMOLED | |
| Resolution | 1440x3168 | 2248x1080 | |
| Refresh rate | 144 Hz | 60 Hz | |
| Battery | 7400 mAh | 3400 mAh | |
| Charging | 120W | 18W | |
| Wireless charging | 50W | 0W | |
| Main camera | 50 MP | 12 MP | |
| Ultrawide | 50 MP | 0 MP | |
| Telephoto | 50 MP | 12 MP | |
| Front camera | 32 MP | 20 MP | |
| RAM | 12GB / 16GB / 24GB | 6GB | |
| Storage | 256GB / 512GB / 1TB | 64GB / 128GB / 256GB | |
| OS | Android 16 | Android 8.1 | |
| Brightness (peak) | 8000 nits | — | |
| NFC | yes | yes | |
| Protection | IP68 | — | |
| Dimensions | 163.7×76.8×8.7 mm | 154.9×74.8×7.6 mm | |
| Weight | 227 g | 175 g | |
| Launch price | $799 | $460 |
Vivo iQOO 15 Ultra
- Main: 50MP f/f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Xiaomi Mi 8
- Main: 12MP f/1.8
- Telephoto: 12MP
- Front: 20MP
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Xiaomi Mi 8
- 6.2" AMOLED
- Resolution: 2248x1080
- Refresh rate: 60 Hz
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Xiaomi Mi 8
- 3400 mAh
- Wired: 18W
- No wireless charging
We compared Vivo iQOO 15 Ultra and Xiaomi Mi 8, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Xiaomi Mi 8 by 673.1% in our overall performance rating.
Launch price difference: $339. Xiaomi Mi 8 was $339 cheaper at launch.
performance
In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Xiaomi Mi 8 (99/100 vs 41/100).
display
In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Xiaomi Mi 8 (99/100 vs 56/100).
camera
In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Xiaomi Mi 8 (78/100 vs 19/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Xiaomi Mi 8 (92/100 vs 12/100).
portability
In the "portability" category, the Xiaomi Mi 8 significantly outperforms the Vivo iQOO 15 Ultra (78/100 vs 35/100).
Which is better: the Vivo iQOO 15 Ultra or the Xiaomi Mi 8?
The Vivo iQOO 15 Ultra significantly outperforms the Xiaomi Mi 8 by 55 points (89/100 vs 34/100).
What is the rating of the Vivo iQOO 15 Ultra and the Xiaomi Mi 8?
The Vivo iQOO 15 Ultra has a MobileRank rating of 89/100, the Xiaomi Mi 8 — 34/100.
Which has the better camera: the Vivo iQOO 15 Ultra or the Xiaomi Mi 8?
The Vivo iQOO 15 Ultra leads on camera score (78/100 vs 19/100).
Which is more powerful: the Vivo iQOO 15 Ultra or the Xiaomi Mi 8?
The Vivo iQOO 15 Ultra leads on performance (99/100 vs 41/100).
Should you choose the Vivo iQOO 15 Ultra over the Xiaomi Mi 8?
The Vivo iQOO 15 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers. The Xiaomi Mi 8 is a better fit for everyday use.