Poco X8 vs Vivo iQOO 15 Ultra
The Poco X8 (2026) runs on the Qualcomm Snapdragon 6s Gen 4, while the Vivo iQOO 15 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5; launch prices were $389 and $799. By overall MobileRank rating, the Vivo iQOO 15 Ultra leads — 89/100 vs 55/100 (a 34-point difference). Key differences: the Poco X8 has the bigger battery (8340 mAh vs 7400); the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 829,894).
Profile comparison
Category scores
Poco X8
Vivo iQOO 15 Ultra
What makes Poco X8 better?
- Bigger battery: 8340 vs 7400 mAh
- Lighter: 223g vs 227g
- Cheaper at launch: $389 vs $799
- Better portability (39/100 vs 35/100)
What makes Vivo iQOO 15 Ultra better?
- Higher AnTuTu: 4602290 vs 829894
- Better Geekbench Single: 3639 vs 1009
- Better Geekbench Multi: 11047 vs 2892
- Faster charging: 120W vs 67W
- Higher refresh rate: 144Hz vs 120Hz
- Higher performance (99/100 vs 55/100)
- Better camera (78/100 vs 35/100)
- Longer battery life (92/100 vs 69/100)
- Better display (99/100 vs 84/100)
Comparison verdict
Comparing the Poco X8 vs the Vivo iQOO 15 Ultra, the Vivo iQOO 15 Ultra scores 34 points higher (89/100 vs 55/100). In the "performance" category, the Vivo iQOO 15 Ultra leads (99/100 vs 55/100). In the "camera" category, the Vivo iQOO 15 Ultra leads (78/100 vs 35/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (92/100 vs 69/100). Value score: Poco X8 — 40/100, Vivo iQOO 15 Ultra — 92/100; 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 Poco X8 (99/100 vs 55/100). In the "display" category, the Vivo iQOO 15 Ultra notably outperforms the Poco X8 (99/100 vs 84/100). In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Poco X8 (78/100 vs 35/100). In the "battery" category, the Vivo iQOO 15 Ultra notably outperforms the Poco X8 (92/100 vs 69/100). In the "portability" category, the Poco X8 and the Vivo iQOO 15 Ultra are nearly equal (39/100 vs 35/100).
Specs comparison
| Specification | Poco X8 | Vivo iQOO 15 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 6s Gen 4 | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 829894 | 4602290 | |
| Geekbench Single | 1009 | 3639 | |
| Geekbench Multi | 2892 | 11047 | |
| Display | 6.8" AMOLED | 6.8" LTPO AMOLED | |
| Resolution | 1280x2772 | 1440x3168 | |
| Refresh rate | 120 Hz | 144 Hz | |
| Battery | 8340 mAh | 7400 mAh | |
| Charging | 67W | 120W | |
| Wireless charging | 0W | 50W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 16 MP | 32 MP | |
| RAM | 6GB / 8GB / 12GB | 12GB / 16GB / 24GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 3500 nits | 8000 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69K | IP68 | |
| Dimensions | 163.5×78.3×8.6 mm | 163.7×76.8×8.7 mm | |
| Weight | 223 g | 227 g | |
| Launch price | $389 | $799 |
Camera comparison
Poco X8
- Main: 50MP f/1.8
- Ultrawide: 8MP
- Front: 16MP
Vivo iQOO 15 Ultra
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
Poco X8
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 120 Hz
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Battery and charging
Poco X8
- 8340 mAh
- Wired: 67W
- No wireless charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Overall performance score
We compared Poco X8 and Vivo iQOO 15 Ultra, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Poco X8 by 82.0% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $410. Poco X8 was $410 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Poco X8 (99/100 vs 55/100).
display
In the "display" category, the Vivo iQOO 15 Ultra notably outperforms the Poco X8 (99/100 vs 84/100).
camera
In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Poco X8 (78/100 vs 35/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra notably outperforms the Poco X8 (92/100 vs 69/100).
portability
In the "portability" category, the Poco X8 and the Vivo iQOO 15 Ultra are nearly equal (39/100 vs 35/100).
Frequently asked questions
Which is better: the Poco X8 or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra significantly outperforms the Poco X8 by 34 points (89/100 vs 55/100).
What is the rating of the Poco X8 and the Vivo iQOO 15 Ultra?
The Poco X8 has a MobileRank rating of 55/100, the Vivo iQOO 15 Ultra — 89/100.
Which has the better camera: the Poco X8 or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on camera score (78/100 vs 35/100).
Which is more powerful: the Poco X8 or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on performance (99/100 vs 55/100).
Should you choose the Poco X8 over the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.