Redmi K90 vs Samsung Galaxy S21
84.3Performance34.4
65.4Display49.1
53.1Camera40.8
83.2Battery36.9
86.7Features78.7
12 spec wins — Redmi K906 spec wins — Samsung Galaxy S21
InnoReviews verdict
Redmi K90 wins this phone face-off, 74.3 to 43.6, pulling ahead mainly in performance (+50) and battery (+46). Samsung Galaxy S21 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
- Stronger performance score: 84 vs 34
- Stronger display score: 65 vs 49
- Stronger camera score: 53 vs 41
- Stronger battery score: 83 vs 37
- Stronger features score: 87 vs 79
Reasons to pick the Samsung Galaxy S21
- 50% higher ultra-wide: 12 MP vs 8 MP
- 28% higher telephoto: 64 MP vs 50 MP
- 17% lower weight: 171 g vs 206 g
- Has eSIM — the other doesn't
Display
| Spec | Redmi K90 | Samsung Galaxy S21 |
|---|---|---|
| Screen size | 6.59 ″+6% | 6.2 ″ |
| Panel type | AMOLED | AMOLED |
| Resolution | 2510x1156 | 2400x1080 |
| Pixel density | 419 ppi | 421 ppi |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 3,500 nits+169% | 1,300 nits |
| Screen-to-body | 89.8 % | — |
Performance
| Spec | Redmi K90 | Samsung Galaxy S21 |
|---|---|---|
| Chipset | Snapdragon 8 Elite | Samsung Exynos 2100 |
| AnTuTu 11 | 3,106,623+316%Top 11% | 746,547Bottom 18% |
| AnTuTu 11 (CPU) | 872,376+246%Top 15% | 252,025Bottom 14% |
| AnTuTu 11 (GPU) | 1,143,259+794%Top 13% | 127,819Bottom 35% |
| AnTuTu 11 (Memory) | 462,601+219%Top 6% | 144,909Bottom 16% |
| AnTuTu 11 (UX) | 628,387+183%Top 13% | 221,794Bottom 18% |
| Geekbench 6 (single) | — | 1,430Top 46% |
| Geekbench 6 (multi) | — | 3,550Bottom 50% |
| RAM (max) | 16 GB+100% | 8 GB |
| Storage options | 256GB / 512GB / 1TB | 128GB / 256GB |
| Storage type | UFS | UFS 3.1 |
Camera
| Spec | Redmi K90 | Samsung Galaxy S21 |
|---|---|---|
| Main camera | 50 MP+317% | 12 MP |
| Main aperture | f/1.88 | f/1.8 |
| Ultra-wide | 8 MP | 12 MP+50% |
| Telephoto | 50 MP | 64 MP+28% |
| Optical zoom | 2.5 x | — |
| Max video | 8K@30fps | 8K@24fps |
| Front camera | 20 MP+100% | 10 MP |
| OIS | Yes | Yes |
Battery
| Spec | Redmi K90 | Samsung Galaxy S21 |
|---|---|---|
| Capacity | 7,100 mAh+78% | 4,000 mAh |
| Wired charging | 100 W+300% | 25 W |
| Wireless charging | — | 15 W |
Design
| Spec | Redmi K90 | Samsung Galaxy S21 |
|---|---|---|
| Weight | 206 g | 171 g+17% |
| Thickness | 8 mm | 7.9 mm+1% |
| IP rating | IP68 | IP68 |
| Frame material | Aluminum | Aluminum |
Connectivity
| Spec | Redmi K90 | Samsung Galaxy S21 |
|---|---|---|
| 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 | Samsung Galaxy S21 |
|---|---|---|
| OS at launch | Android 16 (HyperOS 3) | Android 11 (One UI 3.1) |
| OS update pledge | — | 4 years |
Audio
| Spec | Redmi K90 | Samsung Galaxy S21 |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | No | No |