Redmi K90 Ultra vs Samsung Galaxy A18 4G
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Samsung Galaxy A18 4G (2026) runs on the Exynos 1610; launch prices were $420 and $325. 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 5000); the Samsung Galaxy A18 4G is noticeably lighter (196g vs 227g).
Profile comparison
Category scores
Redmi K90 Ultra
Samsung Galaxy A18 4G
What makes Redmi K90 Ultra better?
- Bigger battery: 8550 vs 5000 mAh
- Faster charging: 100W vs 25W
- Higher refresh rate: 165Hz vs 90Hz
- Better camera (37/100 vs 33/100)
- Longer battery life (78/100 vs 44/100)
- Better display (94/100 vs 67/100)
What makes Samsung Galaxy A18 4G better?
- Lighter: 196g vs 227g
- Cheaper at launch: $325 vs $420
- Better portability (65/100 vs 40/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the Samsung Galaxy A18 4G, the Redmi K90 Ultra scores 27 points higher (73/100 vs 46/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 44/100). Value score: Redmi K90 Ultra — 72/100, Samsung Galaxy A18 4G — 28/100; 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 "display" category, the Redmi K90 Ultra notably outperforms the Samsung Galaxy A18 4G (94/100 vs 67/100). In the "camera" category, the Redmi K90 Ultra and the Samsung Galaxy A18 4G are nearly equal (37/100 vs 33/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the Samsung Galaxy A18 4G (78/100 vs 44/100). In the "portability" category, the Samsung Galaxy A18 4G notably outperforms the Redmi K90 Ultra (65/100 vs 40/100).
Specs comparison
| Specification | Redmi K90 Ultra | Samsung Galaxy A18 4G | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Exynos 1610 | |
| AnTuTu | 3233695 | — | |
| Geekbench Single | 3013 | — | |
| Geekbench Multi | 9287 | — | |
| Display | 6.8" AMOLED | 6.7" Super AMOLED | |
| Resolution | 1280x2772 | 1080x2340 | |
| Refresh rate | 165 Hz | 90 Hz | |
| Battery | 8550 mAh | 5000 mAh | |
| Charging | 100W | 25W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 5 MP | |
| Front camera | 20 MP | 13 MP | |
| RAM | 12GB / 16GB | 4GB | |
| Storage | 256GB / 512GB | 64GB / 128GB / 256GB | |
| OS | Android 16 | Android 17 | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP64 | |
| Dimensions | 162.9×77.9×8.2 mm | 164.4×77.9×7.7 mm | |
| Weight | 227 g | 196 g | |
| Launch price | $420 | $325 |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Samsung Galaxy A18 4G
- Main: 50MP f/1.8
- Ultrawide: 5MP
- Front: 13MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Samsung Galaxy A18 4G
- 6.7" Super AMOLED
- Resolution: 1080x2340
- Refresh rate: 90 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Samsung Galaxy A18 4G
- 5000 mAh
- Wired: 25W
- No wireless charging
Benchmarks
Launch prices and where to check today's
Launch price difference: $95. Samsung Galaxy A18 4G was $95 cheaper at launch.
Detailed category analysis
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Samsung Galaxy A18 4G (94/100 vs 67/100).
camera
In the "camera" category, the Redmi K90 Ultra and the Samsung Galaxy A18 4G are nearly equal (37/100 vs 33/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Samsung Galaxy A18 4G (78/100 vs 44/100).
portability
In the "portability" category, the Samsung Galaxy A18 4G notably outperforms the Redmi K90 Ultra (65/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the Samsung Galaxy A18 4G?
The Redmi K90 Ultra significantly outperforms the Samsung Galaxy A18 4G by 27 points (73/100 vs 46/100).
What is the rating of the Redmi K90 Ultra and the Samsung Galaxy A18 4G?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Samsung Galaxy A18 4G — 46/100.
Should you choose the Redmi K90 Ultra over the Samsung Galaxy A18 4G?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.