Realme Narzo 100x vs Redmi K90 Ultra
The Realme Narzo 100x (2026) runs on the MediaTek Dimensity 6300, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $205 and $420. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 46/100 (a 27-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 8000); 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 Narzo 100x doesn't.
Profile comparison
Category scores
Realme Narzo 100x
Redmi K90 Ultra
What makes Realme Narzo 100x better?
- Lighter: 224g vs 227g
- Cheaper at launch: $205 vs $420
- Overall rating 46/100
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 8000 mAh
- Faster charging: 100W vs 45W
- Higher refresh rate: 165Hz vs 144Hz
- Higher performance (92/100 vs 43/100)
- Better camera (37/100 vs 30/100)
- Longer battery life (78/100 vs 64/100)
- Better display (94/100 vs 65/100)
- Better portability (40/100 vs 36/100)
Comparison verdict
Comparing the Realme Narzo 100x vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 27 points higher (73/100 vs 46/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 43/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 64/100). Value score: Realme Narzo 100x — 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 Narzo 100x (92/100 vs 43/100). In the "display" category, the Redmi K90 Ultra notably outperforms the Realme Narzo 100x (94/100 vs 65/100). 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 is a bit better (78/100 vs 64/100). In the "portability" category, the Redmi K90 Ultra and the Realme Narzo 100x are nearly equal (40/100 vs 36/100).
Specs comparison
| Specification | Realme Narzo 100x | 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 | 8000 mAh | 8550 mAh | |
| Charging | 45W | 100W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Front camera | 8 MP | 20 MP | |
| RAM | 4GB / 6GB | 12GB / 16GB | |
| Storage | 64GB / 128GB / 256GB | 256GB / 512GB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 1200 nits | 3500 nits | |
| NFC | no | yes | |
| Protection | IP65 | IP68/IP69 | |
| Dimensions | 166.4×78.2×8.8 mm | 162.9×77.9×8.2 mm | |
| Weight | 224 g | 227 g | |
| Launch price | $205 | $420 |
Camera comparison
Realme Narzo 100x
- Main: 50MP f/1.8
- Front: 8MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Realme Narzo 100x
- 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 Narzo 100x
- 8000 mAh
- Wired: 45W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Realme Narzo 100x and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Realme Narzo 100x by 83.7% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $215. Realme Narzo 100x was $215 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Realme Narzo 100x (92/100 vs 43/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Realme Narzo 100x (94/100 vs 65/100).
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 is a bit better (78/100 vs 64/100).
portability
In the "portability" category, the Redmi K90 Ultra and the Realme Narzo 100x are nearly equal (40/100 vs 36/100).
Frequently asked questions
Which is better: the Realme Narzo 100x or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Realme Narzo 100x by 27 points (73/100 vs 46/100).
What is the rating of the Realme Narzo 100x and the Redmi K90 Ultra?
The Realme Narzo 100x has a MobileRank rating of 46/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the Realme Narzo 100x or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on camera score (37/100 vs 30/100).
Which is more powerful: the Realme Narzo 100x or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 43/100).
Should you choose the Realme Narzo 100x over the Redmi K90 Ultra?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.