OPPO K15x vs Xiaomi 17 Ultra (China)
The OPPO K15x (2026) runs on the MediaTek Dimensity 6300, while the Xiaomi 17 Ultra (China) (2025) runs on the Snapdragon 8 Elite Gen 5. By overall MobileRank rating, the Xiaomi 17 Ultra (China) leads — 87/100 vs 39/100 (a 48-point difference). Key differences: the Xiaomi 17 Ultra (China) has the bigger battery (6800 mAh vs 6500); the main camera is 13 MP vs 50 MP; the Xiaomi 17 Ultra (China) is faster in AnTuTu (3,950,082 vs 528,398).
Profile comparison
Category scores
OPPO K15x
Xiaomi 17 Ultra (China)
What makes OPPO K15x better?
- Lighter: 212g vs 224g
- Better portability (46/100 vs 42/100)
What makes Xiaomi 17 Ultra (China) better?
- Higher AnTuTu: 3950082 vs 528398
- Better Geekbench Single: 3639 vs 771
- Better Geekbench Multi: 11047 vs 1980
- Bigger battery: 6800 vs 6500 mAh
- Faster charging: 90W vs 45W
- Better main camera: 50MP vs 13MP
- Higher performance (98/100 vs 43/100)
- Better camera (87/100 vs 10/100)
- Longer battery life (83/100 vs 58/100)
- Better display (81/100 vs 55/100)
Comparison verdict
Comparing the OPPO K15x vs the Xiaomi 17 Ultra (China), the Xiaomi 17 Ultra (China) scores 48 points higher (87/100 vs 39/100). In the "performance" category, the Xiaomi 17 Ultra (China) leads (98/100 vs 43/100). In the "camera" category, the Xiaomi 17 Ultra (China) leads (87/100 vs 10/100). In the "battery" category, the Xiaomi 17 Ultra (China) leads (83/100 vs 58/100). In the "performance" category, the Xiaomi 17 Ultra (China) significantly outperforms the OPPO K15x (98/100 vs 43/100). In the "display" category, the Xiaomi 17 Ultra (China) notably outperforms the OPPO K15x (81/100 vs 55/100). In the "camera" category, the Xiaomi 17 Ultra (China) significantly outperforms the OPPO K15x (87/100 vs 10/100). In the "battery" category, the Xiaomi 17 Ultra (China) notably outperforms the OPPO K15x (83/100 vs 58/100). In the "portability" category, the OPPO K15x and the Xiaomi 17 Ultra (China) are nearly equal (46/100 vs 42/100).
Specs comparison
| Specification | OPPO K15x | Xiaomi 17 Ultra (China) | |
|---|---|---|---|
| Processor | MediaTek Dimensity 6300 | Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 528398 | 3950082 | |
| Geekbench Single | 771 | 3639 | |
| Geekbench Multi | 1980 | 11047 | |
| Display | 6.8" IPS LCD | 6.9" LTPO AMOLED | |
| Resolution | 720x1570 | 1200x2608 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 6500 mAh | 6800 mAh | |
| Charging | 45W | 90W | |
| Wireless charging | 0W | 50W | |
| Main camera | 13 MP | 50 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 200 MP | |
| Front camera | 5 MP | 50 MP | |
| RAM | 6GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 512GB / 1TB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 1125 nits | — | |
| NFC | yes | yes | |
| Protection | IP64 | IP68/IP69 | |
| Dimensions | 166.6×78.5×8.6 mm | 162.9×77.6×8.3 mm | |
| Weight | 212 g | 224 g | |
| Launch price | — | $892 |
Camera comparison
OPPO K15x
- Main: 13MP f/2.2
- Front: 5MP
Xiaomi 17 Ultra (China)
- Main: 50MP f/1.7
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 50MP
Display comparison
OPPO K15x
- 6.8" IPS LCD
- Resolution: 720x1570
- Refresh rate: 120 Hz
Xiaomi 17 Ultra (China)
- 6.9" LTPO AMOLED
- Resolution: 1200x2608
- Refresh rate: 120 Hz
Battery and charging
OPPO K15x
- 6500 mAh
- Wired: 45W
- No wireless charging
Xiaomi 17 Ultra (China)
- 6800 mAh
- Wired: 90W
- Wireless: 50W
Overall performance score
We compared OPPO K15x and Xiaomi 17 Ultra (China), covering their specs and all relevant benchmarks.
Xiaomi 17 Ultra (China) leads OPPO K15x by 86.6% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
OPPO K15x
Price unknownDetailed category analysis
performance
In the "performance" category, the Xiaomi 17 Ultra (China) significantly outperforms the OPPO K15x (98/100 vs 43/100).
display
In the "display" category, the Xiaomi 17 Ultra (China) notably outperforms the OPPO K15x (81/100 vs 55/100).
camera
In the "camera" category, the Xiaomi 17 Ultra (China) significantly outperforms the OPPO K15x (87/100 vs 10/100).
battery
In the "battery" category, the Xiaomi 17 Ultra (China) notably outperforms the OPPO K15x (83/100 vs 58/100).
portability
In the "portability" category, the OPPO K15x and the Xiaomi 17 Ultra (China) are nearly equal (46/100 vs 42/100).
Frequently asked questions
Which is better: the OPPO K15x or the Xiaomi 17 Ultra (China)?
The Xiaomi 17 Ultra (China) significantly outperforms the OPPO K15x by 48 points (87/100 vs 39/100).
What is the rating of the OPPO K15x and the Xiaomi 17 Ultra (China)?
The OPPO K15x has a MobileRank rating of 39/100, the Xiaomi 17 Ultra (China) — 87/100.
Which has the better camera: the OPPO K15x or the Xiaomi 17 Ultra (China)?
The Xiaomi 17 Ultra (China) leads on camera score (87/100 vs 10/100).
Which is more powerful: the OPPO K15x or the Xiaomi 17 Ultra (China)?
The Xiaomi 17 Ultra (China) leads on performance (98/100 vs 43/100).
Should you choose the OPPO K15x over the Xiaomi 17 Ultra (China)?
The Xiaomi 17 Ultra (China) is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.