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- S9 vs Redmi K40 Pro
Vivo S9 vs Xiaomi Redmi K40 Pro
What S9 does better (8) and where Redmi K40 Pro wins (9) — every spec side by side.
vs
7.1Display7.9
8.7Camera8.2
3.2Battery4.2
7.1Features7.0
Dimensions
Size comparison
S9Redmi K40 Pro
| S9 | Redmi K40 Pro | Difference | |
|---|---|---|---|
| Height | 158.4 mm | 163.7 mm | −5.3 mm |
| Width | 73.9 mm | 76.4 mm | −2.5 mm |
| Thickness | 7.4 mm | 7.8 mm | −0.4 mm |
| Weight | 173 g | 196 g | −23 g |
Drawn to the same scale from the official dimensions (front and side).
Why is S9 better than Redmi K40 Pro?
- Optical stabilisationYes · Redmi K40 Pro: No
- Selfie camera44 MP vs 20 MP2.2×
- 4K selfie videoYes · Redmi K40 Pro: No
- Weight173 g vs 196 g+13%
- Pixel density409 ppi vs 395 ppi+4%
- Charged in 30 min66% vs 58%+14%
- Main camera aperturef/1.8 vs f/1.9+6%
- Thickness7.4 mm vs 7.8 mm+5%
Why is Redmi K40 Pro better than S9?
- Stereo speakersNo · S9: Yes
- Battery capacity4,000 mAh vs 4,520 mAh+13%
- Refresh rate90 Hz vs 120 Hz+33%
- Max video4K vs 8K
- 4K video frame rate30 fps vs 60 fps2×
- CPU frequency2.6 GHz vs 2.84 GHz+9%
- Screen size6.4″ vs 6.7″+4%
- Wi-Fi standardWi-Fi 5 vs Wi-Fi 6E+30%
- Process6 nm vs 5 nm+20%
Specifications
Side by side
| Design | ||
| Weight | 173 g | 196 g |
| Thickness | 7.4 mm | 7.8 mm |
| Height | 158.4 mm | 163.7 mm |
| Width | 73.9 mm | 76.4 mm |
| Ingress protection | — | IP53 |
| Water resistance (IPx) | — | IPx3 |
| Glass protection | — | Corning Gorilla Glass 5 |
| Colours | Black, White, Gradient Blue | Black, White, Aurora |
| Display | ||
| Screen size | 6.4″ | 6.7″ |
| Panel | AMOLED | Super AMOLED |
| OLED panel | Yes | Yes |
| Resolution (width) | 1,080 px | 1,080 px |
| Resolution (height) | 2,400 px | 2,400 px |
| Pixel density | 409 ppi | 395 ppi |
| Refresh rate | 90 Hz | 120 Hz |
| Peak brightness | — | 1,300 nits |
| Screen-to-body ratio | 85.5% | 85.9% |
| HDR | Yes | Yes |
| Performance | ||
| Chipset | Mediatek Dimensity 1100 | Qualcomm SM8350 Snapdragon 888 5G |
| Chip maker | MediaTek | Qualcomm |
| Process | 6 nm | 5 nm |
| CPU cores | 8 | 8 |
| CPU frequency | 2.6 GHz | 2.84 GHz |
| GPU | Mali-G77 MC9 | Adreno 660 |
| Memory | ||
| RAM | 12 GB | 12 GB |
| Storage (max) | 256 GB | 256 GB |
| Storage (base) | 128 GB | 128 GB |
| Storage type | UFS 3.1 | UFS 3.1 |
| Memory card slot | No | No |
| Camera | ||
| Main camera | 64 MP | 64 MP |
| Main camera aperture | f/1.8 | f/1.9 |
| Main sensor size | 1/1.72" | 1/1.7" |
| Rear cameras | 2 | 2 |
| Optical stabilisation | Yes | No |
| Ultra-wide camera | Yes | Yes |
| Telephoto camera | No | No |
| Max video | 4K | 8K |
| 4K video frame rate | 30 fps | 60 fps |
| Selfie camera | 44 MP | 20 MP |
| 4K selfie video | Yes | No |
| Battery | ||
| Battery capacity | 4,000 mAh | 4,520 mAh |
| Battery type | — | Li-Po |
| Wired charging | 33 W | 33 W |
| Charged in 30 min | 66% | 58% |
| Wireless charging | No | No |
| Connectivity | ||
| 5G | Yes | Yes |
| eSIM | No | No |
| Dual SIM | Yes | Yes |
| Wi-Fi standard | Wi-Fi 5 | Wi-Fi 6E |
| Bluetooth | 5.2 | 5.2 |
| NFC | Yes | Yes |
| USB | USB Type-C | USB Type-C 2.0 |
| USB version | — | 2 |
| Dual-band GPS | — | Yes |
| Satellite navigation | GLONASS, GALILEO, BDS | GLONASS, GALILEO, BDS, QZSS, NavIC |
| Features | ||
| Stereo speakers | No | Yes |
| 3.5 mm headphone jack | No | No |
| Fingerprint sensor | Under display | Side |
| Barometer | — | Yes |
| Sensors | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, barometer |
| Software | ||
| OS at launch | Android 11 | Android 11 |
| Platform | Android | Android |
| Interface | OriginOS 1.0 | MIUI 12 |
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