Realme P4x vs Redmi K90 Ultra
The Realme P4x (2025) runs on the MediaTek Dimensity 7400 Ultra, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $190 and $420. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 52/100 (a 21-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 876,440); the Redmi K90 Ultra has NFC for contactless payments, the Realme P4x doesn't; the Realme P4x is noticeably lighter (208g vs 227g).
Profile comparison
Category scores
Realme P4x
Redmi K90 Ultra
What makes Realme P4x better?
- Lighter: 208g vs 227g
- Cheaper at launch: $190 vs $420
- Better portability (50/100 vs 40/100)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 876440
- Better Geekbench Single: 3013 vs 1050
- Better Geekbench Multi: 9287 vs 2939
- Bigger battery: 8550 vs 7000 mAh
- Faster charging: 100W vs 45W
- Higher refresh rate: 165Hz vs 144Hz
- Higher performance (92/100 vs 56/100)
- Better camera (37/100 vs 30/100)
- Longer battery life (78/100 vs 60/100)
- Better display (94/100 vs 76/100)
Comparison verdict
Comparing the Realme P4x vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 21 points higher (73/100 vs 52/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 56/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 60/100). Value score: Realme P4x — 68/100, 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 P4x (92/100 vs 56/100). In the "display" category, the Redmi K90 Ultra notably outperforms the Realme P4x (94/100 vs 76/100). In the "camera" category, the Redmi K90 Ultra is a bit better (37/100 vs 30/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the Realme P4x (78/100 vs 60/100). In the "portability" category, the Realme P4x is a bit better (50/100 vs 40/100).
Specs comparison
| Specification | Realme P4x | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 7400 Ultra | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 876440 | 3233695 | |
| Geekbench Single | 1050 | 3013 | |
| Geekbench Multi | 2939 | 9287 | |
| Display | 6.7" IPS LCD | 6.8" AMOLED | |
| Resolution | 1080x2400 | 1280x2772 | |
| Refresh rate | 144 Hz | 165 Hz | |
| Battery | 7000 mAh | 8550 mAh | |
| Charging | 45W | 100W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Front camera | 8 MP | 20 MP | |
| RAM | 6GB / 8GB | 12GB / 16GB | |
| Storage | 128GB / 256GB / 512GB | 256GB / 512GB | |
| OS | Android 15, Realme UI 6.0 | Android 16 | |
| Brightness (peak) | 1000 nits | 3500 nits | |
| NFC | no | yes | |
| Protection | IP64 | IP68/IP69 | |
| Dimensions | 165.9×76.0×8.4 mm | 162.9×77.9×8.2 mm | |
| Weight | 208 g | 227 g | |
| Launch price | $190 | $420 |
Camera comparison
Realme P4x
- Main: 50MP f/1.8
- Front: 8MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Realme P4x
- 6.7" IPS LCD
- Resolution: 1080x2400
- Refresh rate: 144 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
Realme P4x
- 7000 mAh
- Wired: 45W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Realme P4x and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Realme P4x by 72.9% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $230. Realme P4x was $230 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Realme P4x (92/100 vs 56/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Realme P4x (94/100 vs 76/100).
camera
In the "camera" category, the Redmi K90 Ultra is a bit better (37/100 vs 30/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the Realme P4x (78/100 vs 60/100).
portability
In the "portability" category, the Realme P4x is a bit better (50/100 vs 40/100).
Frequently asked questions
Which is better: the Realme P4x or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Realme P4x by 21 points (73/100 vs 52/100).
What is the rating of the Realme P4x and the Redmi K90 Ultra?
The Realme P4x has a MobileRank rating of 52/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the Realme P4x or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on camera score (37/100 vs 30/100).
Which is more powerful: the Realme P4x or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 56/100).
Should you choose the Realme P4x over the Redmi K90 Ultra?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.