Redmi K90 vs Samsung Galaxy S23 Ultra
The Redmi K90 (2025) runs on the Qualcomm Snapdragon 8 Elite, while the Samsung Galaxy S23 Ultra (2023) runs on the Qualcomm Snapdragon 8 Gen 2; launch prices were $401 and $1199. By overall MobileRank rating, the Redmi K90 leads — 76/100 vs 70/100 (a 6-point difference). Key differences: the Redmi K90 has the bigger battery (7100 mAh vs 5000); the main camera is 50 MP vs 200 MP; the Redmi K90 is faster in AnTuTu (3,077,585 vs 1,684,869); the Redmi K90 is noticeably lighter (206g vs 234g).
Profile comparison
Category scores
Redmi K90
Samsung Galaxy S23 Ultra
What makes Redmi K90 better?
- Higher AnTuTu: 3077585 vs 1684869
- Better Geekbench Single: 3013 vs 2004
- Better Geekbench Multi: 9287 vs 5311
- Bigger battery: 7100 vs 5000 mAh
- Faster charging: 100W vs 45W
- Lighter: 206g vs 234g
- Cheaper at launch: $401 vs $1199
- Higher performance (91/100 vs 75/100)
- Longer battery life (72/100 vs 56/100)
- Better portability (55/100 vs 29/100)
What makes Samsung Galaxy S23 Ultra better?
- Better main camera: 200MP vs 50MP
- Better camera (73/100 vs 58/100)
- Better display (88/100 vs 82/100)
Comparison verdict
Comparing the Redmi K90 vs the Samsung Galaxy S23 Ultra, the Redmi K90 scores 6 points higher (76/100 vs 70/100). In the "performance" category, the Redmi K90 leads (91/100 vs 75/100). In the "camera" category, the Samsung Galaxy S23 Ultra leads (73/100 vs 58/100). In the "battery" category, the Redmi K90 leads (72/100 vs 56/100). Value score: Redmi K90 — 80/100, Samsung Galaxy S23 Ultra — 50/100; 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 notably outperforms the Samsung Galaxy S23 Ultra (91/100 vs 75/100). In the "display" category, the Samsung Galaxy S23 Ultra is a bit better (88/100 vs 82/100). In the "camera" category, the Samsung Galaxy S23 Ultra notably outperforms the Redmi K90 (73/100 vs 58/100). In the "battery" category, the Redmi K90 notably outperforms the Samsung Galaxy S23 Ultra (72/100 vs 56/100). In the "portability" category, the Redmi K90 notably outperforms the Samsung Galaxy S23 Ultra (55/100 vs 29/100).
Specs comparison
| Specification | Redmi K90 | Samsung Galaxy S23 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 8 Gen 2 | |
| AnTuTu | 3077585 | 1684869 | |
| Geekbench Single | 3013 | 2004 | |
| Geekbench Multi | 9287 | 5311 | |
| Display | 6.6" AMOLED | 6.8" AMOLED | |
| Resolution | 2510x1156 | 1440x3088 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 7100 mAh | 5000 mAh | |
| Charging | 100W | 45W | |
| Wireless charging | 0W | 15W | |
| DXOMark (camera) | — | 140 | |
| Main camera | 50 MP | 200 MP | |
| Ultrawide | 8 MP | 12 MP | |
| Telephoto | 50 MP | 10 MP | |
| Front camera | 20 MP | 12 MP | |
| RAM | 12GB / 16GB | 8GB / 12GB | |
| Storage | 256GB / 512GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 13, up to 4 major Android upgrades, One UI 8 | |
| Brightness (peak) | 3500 nits | 1750 nits | |
| NFC | yes | yes | |
| Protection | IP68 | IP68 | |
| Dimensions | 157.5×75.3×8.0 mm | 163.4×78.1×8.9 mm | |
| Weight | 206 g | 234 g | |
| Launch price | $401 | $1199 |
Camera comparison
Redmi K90
- Main: 50MP f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Samsung Galaxy S23 Ultra
- Main: 200MP f/1.7
- Ultrawide: 12MP
- Telephoto: 10MP
- Front: 12MP
Display comparison
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 Hz
Samsung Galaxy S23 Ultra
- 6.8" AMOLED
- Resolution: 1440x3088
- Refresh rate: 120 Hz
Battery and charging
Redmi K90
- 7100 mAh
- Wired: 100W
- No wireless charging
Samsung Galaxy S23 Ultra
- 5000 mAh
- Wired: 45W
- Wireless: 15W
Overall performance score
We compared Redmi K90 and Samsung Galaxy S23 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 leads Samsung Galaxy S23 Ultra by 82.7% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $798. Redmi K90 was $798 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 notably outperforms the Samsung Galaxy S23 Ultra (91/100 vs 75/100).
display
In the "display" category, the Samsung Galaxy S23 Ultra is a bit better (88/100 vs 82/100).
camera
In the "camera" category, the Samsung Galaxy S23 Ultra notably outperforms the Redmi K90 (73/100 vs 58/100).
battery
In the "battery" category, the Redmi K90 notably outperforms the Samsung Galaxy S23 Ultra (72/100 vs 56/100).
portability
In the "portability" category, the Redmi K90 notably outperforms the Samsung Galaxy S23 Ultra (55/100 vs 29/100).
Frequently asked questions
Which is better: the Redmi K90 or the Samsung Galaxy S23 Ultra?
The Redmi K90 edges out the Samsung Galaxy S23 Ultra by just 6 points — the two devices are very close in overall level.
What is the rating of the Redmi K90 and the Samsung Galaxy S23 Ultra?
The Redmi K90 has a MobileRank rating of 76/100, the Samsung Galaxy S23 Ultra — 70/100.
Which has the better camera: the Redmi K90 or the Samsung Galaxy S23 Ultra?
The Samsung Galaxy S23 Ultra leads on camera score (73/100 vs 58/100).
Which is more powerful: the Redmi K90 or the Samsung Galaxy S23 Ultra?
The Redmi K90 leads on performance (91/100 vs 75/100).
Should you choose the Redmi K90 over the Samsung Galaxy S23 Ultra?
The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers. The Samsung Galaxy S23 Ultra is a better fit for active users.