Xiaomi Redmi K40 vs Mi 10i
Here we compared two smartphones: the 6.67-inch Xiaomi Redmi K40 (with Qualcomm Snapdragon 870 5G) that was released on February 25, 2021, against the Xiaomi Mi 10i, which is powered by Qualcomm Snapdragon 750G and came out 2 months before. On this page, you will find tests, full specs, strengths, and weaknesses of each of the gadgets.
Key differences
Reasons to consider the Xiaomi Redmi K40
- Water-resistant body (IP53 classification)
- 78% better performance in AnTuTu Benchmark (690K versus 386K)
- Newer Bluetooth version (v5.1)
- Uses a faster type of memory: LPDDR5 2750 MHz
- More recent OS version: Android 11 versus 10
- AMOLED display (versus competitor's IPS LCD)
Reasons to consider the Xiaomi Mi 10i
- Expandable storage via MicroSD card up to 512GB
- Comes with 300 mAh larger battery capacity: 4820 vs 4520 mAh
- Includes a 3.5 mm headphone audio jack port
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Review
Display
Screen quality, color accuracy, brightness
Performance
CPU/GPU performance in apps and games
Battery
Battery life, charging type and speed
Camera
Photo and video recording quality
Connectivity
Networks, ports, data transmission
NanoReview score
Final comparison evaluation
Value for money
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Tests and specifications
Comparison table of technical specifications and testsDisplay
| Type | AMOLED | IPS LCD |
| Size | 6.67 inches | 6.67 inches |
| Resolution | 1080 x 2400 pixels | 1080 x 2400 pixels |
| Aspect ratio | 20:9 | 20:9 |
| PPI | 395 ppi | 395 ppi |
| Refresh rate | 120 Hz | 120 Hz |
| Max rated brightness | 500 nits | 450 nits |
| Max rated brightness in HDR | 1300 nits | - |
| HDR support | Yes, HDR10+ | Yes, HDR10 |
| Screen protection | Corning Gorilla Glass 5 | Corning Gorilla Glass 5 |
| Screen-to-body ratio | 85.9% | 84.6% |
| Display features | - DCI-P3 - Always-On Display - DC Dimming |
- |
Design and build
| Height | 163.7 mm (6.44 inches) | 165.4 mm (6.51 inches) |
| Width | 76.4 mm (3.01 inches) | 76.8 mm (3.02 inches) |
| Thickness | 7.8 mm (0.31 inches) | 9 mm (0.35 inches) |
| Weight | 196 g (6.91 oz) | 214.5 g (7.57 oz) |
| Waterproof | IP53 | No |
| Rear material | Glass | Glass |
| Frame material | Plastic | Plastic |
| Colors | White, Black | Black, Blue, Green |
| Fingerprint scanner | Yes, in home button | Yes, in home button |
Screen-to-body ratio
Performance
| Chipset | Qualcomm Snapdragon 870 5G | Qualcomm Snapdragon 750G |
| Max. clock | 3200 MHz | 2200 MHz |
| CPU cores | 8 (1 + 3 + 4) | 8 (2 + 6) |
| Architecture | - 4 cores at 1.8 GHz: Kryo 585 Silver (Cortex-A55) - 3 cores at 2.42 GHz: Kryo 585 Gold (Cortex-A77) - 1 core at 3.2 GHz: Kryo 585 Prime (Cortex-A77) |
- 6 cores at 1.8 GHz: Kryo 570 Silver (Cortex-A55) - 2 cores at 2.2 GHz: Kryo 570 Gold (Cortex-A77) |
| L3 cache | 4 MB | - |
| Lithography process | 7 nanometers | 8 nanometers |
| Graphics | Adreno 650 | Adreno 619 |
| GPU clock | 675 MHz | 825 MHz |
| FLOPS | ~1372 GFLOPS | - |
Benchmarks
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)
AnTuTu Benchmark 9
| CPU | 197488 | 120338 |
| GPU | 242243 | 92398 |
| Memory | 106088 | 72671 |
| UX | 150139 | 102436 |
| Total score | 690239 | 386746 |
3DMark Wild Life Performance
| Stability | 91% | 99% |
| Graphics test | 25 FPS | 6 FPS |
| Graphics score | 4280 | 1093 |
| PCMark 3.0 score | 12006 | - |
Memory
| RAM size | 6, 8, 12 GB | 6, 8 GB |
| Memory type | LPDDR5 | LPDDR4X |
| Memory clock | 2750 MHz | 2133 MHz |
| Channels | 4 | 2 |
| Storage size | 128, 256 GB | 64, 128 GB |
| Storage type | UFS 3.1 | UFS 2.2 |
| Memory card | No | MicroSD |
| Memory card max. size | - | Up to 512 GB |
Software
| Operating system | Android 11 | Android 10 |
| ROM | MIUI 12.5 Enhanced | MIUI 12 |
Battery
| Capacity | 4520 mAh | 4820 mAh |
| Charge power | 33 W | 33 W |
| Battery type | Li-Po | Li-Po |
| Replaceable | No | No |
| Wireless charging | No | No |
| Reverse charging | No | No |
| Fast charging | Yes (70% in 30 min) | Yes (50% in 25 min) |
| Full charging time | 0:52 hr | 0:58 hr |
Camera
| Matrix | 48 megapixels | 108 megapixels |
| Image resolution | 8000 x 6000 | 12032 x 9024 |
| Zoom | Digital | Digital |
| Flash | LED | LED |
| Stabilization | Digital | Digital |
| 8K video recording | No | No |
| 4K video recording | Up to 30FPS | Up to 30FPS |
| 1080p video recording | Up to 60FPS | Up to 60FPS |
| Slow motion | 960 FPS (720p) | 960 FPS (720p) |
| Angle of widest lens | 119° | 120° |
| Lenses | 3 (48 MP + 8 MP + 5 MP) | 4 (108 MP + 8 MP + 2 MP + 2 MP) |
| Wide (main) lens | - 48 MP - Aperture: f/1.8 - Focal length: 26 mm - Pixel size: 0.8 micron - Sensor: 1/2.0" (CMOS) - Phase autofocus |
- 108 MP - Aperture: f/1.8 - Focal length: 26 mm - Pixel size: 0.8 micron - Sensor: 1/1.52", ISOCELL HM2 (ISOCELL Plus CMOS) - Phase autofocus |
| Ultra-wide lens | - 8 MP - Aperture: f/2.2 - Pixel size: 1.12 micron - Sensor: 1/4.0" (CMOS) |
- 8 MP - Aperture: f/2.2 - Focal length: 13 mm - Pixel size: 1.12 micron - Sensor: 1/4.0" (CMOS) |
| Macro lens | - 5 MP - Aperture: f/2.4 - Focal length: 50 mm - Pixel size: 1.12 micron - Sensor: 1/5.0" (CMOS) |
- 2 MP - Aperture: f/2.4 |
| Depth lens | - | - 2 MP - Aperture: f/2.4 |
| Camera features | - Bokeh mode - Pro mode |
- Bokeh mode - Pro mode |
| Megapixels | 20 megapixels | 16 megapixels |
| Image resolution | 4608 x 3456 | 4608 x 3456 |
| Aperture | f/2.5 | f/2.5 |
| Focal length | 26 mm | - |
| Pixel size | 0.8 microns | 1 microns |
| Sensor type | CMOS | CMOS |
| Sensor size | 1/3.4" | 1/3.06" |
| Video resolution | 1080p (Full HD) at 30 FPS | 1080p (Full HD) at 30 FPS |
Connectivity
| Wi-Fi standard | Wi-Fi 6E (802.11 a/b/g/n/ac/ax) | Wi-Fi 5 (802.11 b/g/n/ac) |
| Wi-Fi features | - Dual Band - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display |
- Dual Band - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display |
| Bluetooth version | 5.1 | 5 |
| Bluetooth features | LE, HID, A2DP | LE, HID, A2DP |
| USB type | USB Type-C | USB Type-C |
| USB version | 2 | 2 |
| USB features | - Charging - USB-Storage mode - OTG |
- Charging - USB-Storage mode - OTG |
| GPS | GPS, GLONASS, Beidou, Galileo, NAVIC | GPS, GLONASS, Beidou, Galileo, NAVIC |
| NFC* | Yes | Yes |
| Infrared port | Yes | Yes |
| Number of SIM* | 2 | 2 |
| Type of SIM card | Nano | Nano |
| Multi SIM mode | Standby | Standby |
| eSIM support* | No | No |
| Hybrid slot | No | Yes |
| LTE Cat* | 20 | 18 |
| 5G support | Yes | Yes |
Sound
| Speakers | Stereo | Stereo |
| Headphone audio jack | No | Yes |
| FM radio | No | Yes |
| Dolby Atmos | Yes | No |
Other
| Category | Flagship | Mid-range |
| Announced | February 2021 | January 2021 |
| Release date | March 2021 | January 2021 |
| SAR (head) | - | 0.88 W/kg |
| Sensors | - Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Compass - Fingerprint |
- Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Compass - Fingerprint |
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.
Conclusion
After analyzing all the data, we think that the Xiaomi Redmi K40 is definitely a better buy.
Cast your vote
Total votes: 7