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 (3,119,308 vs 876,129); the Redmi K90 Ultra has NFC for contactless payments, the Realme P4x doesn't; the Realme P4x is noticeably lighter (208g vs 227g).
Realme P4x
Redmi K90 Ultra
- Lighter: 208g vs 227g
- Cheaper at launch: $190 vs $420
- Better portability (50/100 vs 40/100)
- Higher AnTuTu: 3119308 vs 876129
- Better Geekbench Single: 3041 vs 1050
- Better Geekbench Multi: 9494 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)
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 — 70/100, 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 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).
| Specification | Realme P4x | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 7400 Ultra | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 876129 | 3119308 | |
| Geekbench Single | 1050 | 3041 | |
| Geekbench Multi | 2939 | 9494 | |
| 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 |
Realme P4x
- Main: 50MP f/f/1.8
- Front: 8MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Realme P4x
- 6.7" IPS LCD
- Resolution: 1080x2400
- Refresh rate: 144 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Realme P4x
- 7000 mAh
- Wired: 45W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
We compared Realme P4x and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Realme P4x by 71.9% in our overall performance rating.
Launch price difference: $230. Realme P4x was $230 cheaper at launch.
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).
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 Realme P4x is a better fit for everyday use. The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.