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 572,788); the Xiaomi Mi 8 is noticeably lighter (175g vs 227g).
Profile comparison
Category scores
Vivo iQOO 15 Ultra
Xiaomi Mi 8
What makes Vivo iQOO 15 Ultra better?
- Higher AnTuTu: 4602290 vs 572788
- Better Geekbench Single: 3639 vs 566
- Better Geekbench Multi: 11047 vs 2130
- 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)
What makes Xiaomi Mi 8 better?
- Lighter: 175g vs 227g
- Cheaper at launch: $460 vs $799
- Better portability (78/100 vs 35/100)
Comparison verdict
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 — 92/100, Xiaomi Mi 8 — 0/100; it shows how far a model sits above or below the usual level for its price, and is not part of the overall rating. 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).
Specs comparison
| Specification | Vivo iQOO 15 Ultra | Xiaomi Mi 8 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite Gen 5 | Qualcomm Snapdragon 845 | |
| AnTuTu | 4602290 | 572788 | |
| Geekbench Single | 3639 | 566 | |
| Geekbench Multi | 11047 | 2130 | |
| 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 |
Camera comparison
Vivo iQOO 15 Ultra
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Xiaomi Mi 8
- Main: 12MP f/1.8
- Telephoto: 12MP
- Front: 20MP
Display comparison
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
Battery and charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Xiaomi Mi 8
- 3400 mAh
- Wired: 18W
- No wireless charging
Overall performance score
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 703.5% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $339. Xiaomi Mi 8 was $339 cheaper at launch.
Detailed category analysis
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).
Frequently asked questions
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.