REDMI K90 Ultra vs Samsung Galaxy S21 FE 5G
64.4Performance37.5
78.7Display47.2
43.4Camera41.7
83.2Battery41.7
86.7Features78.7
8 spec wins — REDMI K90 Ultra5 spec wins — Samsung Galaxy S21 FE 5G
InnoReviews verdict
REDMI K90 Ultra wins this phone face-off, 69.1 to 45.2, pulling ahead mainly in battery (+42) and display (+32). Samsung Galaxy S21 FE 5G still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the REDMI K90 Ultra
- Stronger performance score: 64 vs 38
- Stronger display score: 79 vs 47
- Stronger battery score: 83 vs 42
- Stronger features score: 87 vs 79
- 317% higher Main camera: 50 MP vs 12 MP
Reasons to pick the Samsung Galaxy S21 FE 5G
- 60% higher Front camera: 32 MP vs 20 MP
- 50% higher ultra-wide: 12 MP vs 8 MP
- 22% lower weight: 177 g vs 227 g
- Has eSIM — the other doesn't
Display
| Spec | REDMI K90 Ultra | Samsung Galaxy S21 FE 5G |
|---|---|---|
| Screen size | 6.83 ″+7% | 6.4 ″ |
| Panel type | AMOLED | AMOLED |
| Resolution | 1280x2772 | 2340x1080 |
| Pixel density | 447 ppi+11% | 401 ppi |
| Refresh rate | 165 Hz+38% | 120 Hz |
| Peak brightness | 3,500 nits+192% | 1,200 nits |
| Screen-to-body | 90.3 % | — |
Performance
| Spec | REDMI K90 Ultra | Samsung Galaxy S21 FE 5G |
|---|---|---|
| Chipset | Snapdragon 8 Elite | Snapdragon 888 |
| AnTuTu | — | 1,040,324 |
| Geekbench 6 (single) | — | 1,450Top 44% |
| Geekbench 6 (multi) | — | 3,650Top 50% |
| RAM (max) | 16 GB+167% | 6 GB |
| Storage options | 256/512GB | 128GB / 256GB |
| Storage type | UFS 4.1 | UFS 3.1 |
Camera
| Spec | REDMI K90 Ultra | Samsung Galaxy S21 FE 5G |
|---|---|---|
| Main camera | 50 MP+317% | 12 MP |
| Main aperture | f/1.7 | f/1.8 |
| Ultra-wide | 8 MP | 12 MP+50% |
| Telephoto | — | 8 MP |
| Optical zoom | — | 3 x |
| Max video | 8K@30fps | 4K@60fps |
| Front camera | 20 MP | 32 MP+60% |
| OIS | Yes | Yes |
Battery
| Spec | REDMI K90 Ultra | Samsung Galaxy S21 FE 5G |
|---|---|---|
| Capacity | 8,550 mAh+90% | 4,500 mAh |
| Wired charging | 100 W+300% | 25 W |
| Wireless charging | — | 15 W |
Design
| Spec | REDMI K90 Ultra | Samsung Galaxy S21 FE 5G |
|---|---|---|
| Weight | 227 g | 177 g+22% |
| Thickness | 8.2 mm | 7.9 mm+4% |
| IP rating | IP68/IP69 | IP68 |
| Frame material | Aluminum | Aluminum |
Connectivity
| Spec | REDMI K90 Ultra | Samsung Galaxy S21 FE 5G |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 7 | Wi-Fi 6 |
| Bluetooth | 5.4 | 5.0 |
| NFC | Yes | Yes |
| USB | USB-C | USB-C 3.2 |
| eSIM | No | Yes |
Software
| Spec | REDMI K90 Ultra | Samsung Galaxy S21 FE 5G |
|---|---|---|
| OS at launch | Android 16 (HyperOS 3) | Android 12 (One UI 4) |
| OS update pledge | — | 4 years |
Audio
| Spec | REDMI K90 Ultra | Samsung Galaxy S21 FE 5G |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | No | No |
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