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 (3,233,695 vs 528,398); the Redmi K90 Ultra has NFC for contactless payments, the Realme 15x doesn't; the Realme 15x is noticeably lighter (212g vs 227g).
Profile comparison
Category scores
Realme 15x
Redmi K90 Ultra
What makes Realme 15x better?
- Lighter: 212g vs 227g
- Cheaper at launch: $250 vs $420
- Better camera (40/100 vs 37/100)
- Better portability (49/100 vs 40/100)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 528398
- Better Geekbench Single: 3013 vs 771
- Better Geekbench Multi: 9287 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)
Comparison verdict
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 — 52/100, Redmi K90 Ultra — 72/100; 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 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).
Specs comparison
| Specification | Realme 15x | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 6300 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 528398 | 3233695 | |
| Geekbench Single | 771 | 3013 | |
| Geekbench Multi | 1980 | 9287 | |
| 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 |
Camera comparison
Realme 15x
- Main: 50MP f/1.8
- Front: 50MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Realme 15x
- 6.8" IPS LCD
- Resolution: 720x1570
- Refresh rate: 144 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
Realme 15x
- 7000 mAh
- Wired: 60W
- Wireless charging: no data
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Realme 15x and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Realme 15x by 83.7% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $170. Realme 15x was $170 cheaper at launch.
Detailed category analysis
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).
Frequently asked questions
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.