Realme 15x vs Redmi K90 Ultra
The Realme 15x (2025) runs on the MediaTek Dimensity 6300, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $250 and $420. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 51/100 (a 22-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 7000); the Redmi K90 Ultra is faster in AnTuTu (3,119,308 vs 524,785); the Redmi K90 Ultra has NFC for contactless payments, the Realme 15x doesn't; the Realme 15x is noticeably lighter (212g vs 227g).
Realme 15x
Redmi K90 Ultra
- Lighter: 212g vs 227g
- Cheaper at launch: $250 vs $420
- Better camera (40/100 vs 37/100)
- Better portability (49/100 vs 40/100)
- Higher AnTuTu: 3119308 vs 524785
- Better Geekbench Single: 3041 vs 771
- Better Geekbench Multi: 9494 vs 1980
- Bigger battery: 8550 vs 7000 mAh
- Faster charging: 100W vs 60W
- Higher refresh rate: 165Hz vs 144Hz
- Higher performance (92/100 vs 43/100)
- Longer battery life (78/100 vs 75/100)
- Better display (94/100 vs 65/100)
Comparing the Realme 15x vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 22 points higher (73/100 vs 51/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 43/100). Value score: Realme 15x — 54/100, Redmi K90 Ultra — 82/100; it is biased by price level, so it should not be compared directly between devices at different prices. In the "performance" category, the Redmi K90 Ultra significantly outperforms the Realme 15x (92/100 vs 43/100). In the "display" category, the Redmi K90 Ultra notably outperforms the Realme 15x (94/100 vs 65/100). In the "camera" category, the Realme 15x and the Redmi K90 Ultra are nearly equal (40/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra and the Realme 15x are nearly equal (78/100 vs 75/100). In the "portability" category, the Realme 15x is a bit better (49/100 vs 40/100).
| Specification | Realme 15x | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 6300 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 524785 | 3119308 | |
| Geekbench Single | 771 | 3041 | |
| Geekbench Multi | 1980 | 9494 | |
| Display | 6.8" IPS LCD | 6.8" AMOLED | |
| Resolution | 720x1570 | 1280x2772 | |
| Refresh rate | 144 Hz | 165 Hz | |
| Battery | 7000 mAh | 8550 mAh | |
| Charging | 60W | 100W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Front camera | 50 MP | 20 MP | |
| RAM | 6GB / 8GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB | |
| OS | Android 15 | Android 16 | |
| Brightness (peak) | 1200 nits | 3500 nits | |
| NFC | no | yes | |
| Protection | IP68/IP69 | IP68/IP69 | |
| Dimensions | 166.1×77.9×8.3 mm | 162.9×77.9×8.2 mm | |
| Weight | 212 g | 227 g | |
| Launch price | $250 | $420 |
Realme 15x
- Main: 50MP f/1.8
- Front: 50MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Realme 15x
- 6.8" IPS LCD
- Resolution: 720x1570
- Refresh rate: 144 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Realme 15x
- 7000 mAh
- Wired: 60W
- Wireless charging: no data
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
We compared Realme 15x and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Realme 15x by 83.2% in our overall performance rating.
Launch price difference: $170. Realme 15x was $170 cheaper at launch.
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Realme 15x (92/100 vs 43/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Realme 15x (94/100 vs 65/100).
camera
In the "camera" category, the Realme 15x and the Redmi K90 Ultra are nearly equal (40/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra and the Realme 15x are nearly equal (78/100 vs 75/100).
portability
In the "portability" category, the Realme 15x is a bit better (49/100 vs 40/100).
Which is better: the Realme 15x or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Realme 15x by 22 points (73/100 vs 51/100).
What is the rating of the Realme 15x and the Redmi K90 Ultra?
The Realme 15x has a MobileRank rating of 51/100, the Redmi K90 Ultra — 73/100.
Which is more powerful: the Realme 15x or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 43/100).
Should you choose the Realme 15x over the Redmi K90 Ultra?
The Realme 15x is a better fit for those who care about battery life. The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.