Samsung Galaxy S21 Ultra vs Xiaomi Redmi Note 15 Pro 5G
67
out 100
VS
70
out 100
Compared 2 smartphones : Samsung Galaxy S21 Ultra Manufactured in February, 2021, with display 6.8 with chipsetSamsung Exynos 2100, vs Xiaomi Redmi Note 15 Pro 5G, Manufactured in August, 2025 with chipsetMediaTek Dimensity 7400 Ultra. Below are specs, tests, pros and cons for each device
Key Differences
Reasons to choose Samsung Galaxy S21 Ultra
- Higher pixel density: 515ppi
- Supports newer USB: 3.2 vs 2
- Supports Dolby Atmos
- Built-in eSIM
Reasons to choose Xiaomi Redmi Note 15 Pro 5G
- Larger display: 6.83in
- Lighter design: 211g vs 227g
- Higher battery capacity: 7000mAh vs 5000mAh
- Newer Bluetooth version: 5.4 vs 5.2
- Infrared port
- Includes charger
Versions
| Memory Options | - 12/128 GB - 12/256 GB - 12/512 GB - 16/256 GB - 16/512 GB |
- 8/256 GB - 12/256 GB - 12/512 GB |
Review
Display
Color accuracy, sharpness & brightness
Camera
Main & front camera tests
Performance
App & system performance
Games
3D gaming performance
Battery
Battery life, charging speed & type
Connectivity
Connectivity features
Adjust each parameter’s importance to find the best match for you.
Tests & specs
Specs & test comparisonDisplay
| Type | Dynamic AMOLED | AMOLED |
| Size | 6.8 in | 6.83 in |
| Resolution | 1440x3200 pixels | 1220x2772 pixels |
| Aspect ratio | 20:9 | n/a |
| Pixel density | 515 ppi | 443 ppi |
| Refresh rate | 120 Hz | 120 Hz |
| Adaptive refresh rate | Yes (10-120 Hz) | Yes (60-120 Hz) |
| Max brightness | 1500 nits | n/a |
| HDR support | Yes HDR10+ | Yes, Dolby Vision |
| Screen-to-body ratio | 89.5 % | 86.8 % |
| Features | - DCI-P3 - Always-On Display |
- DCI-P3 - Always-On Display - DC dimming |
Design & Build
| Height | 165.1 mm (6.5 in) | 163.3 mm (6.43 in) |
| Width | 75.6 mm (2.98 in) | 78.1 mm (3.07 in) |
| Thickness | 8.9 mm (0.35 in) | 7.8 mm (0.31 in) |
| Weight | 227 g (8.01 oz) | 211 g (7.44 oz) |
| Water resistance | IP68 | IP69 |
| Back panel | Glass | n/a |
| Frame | Metal | Plastic |
| Colors | - Black - Silver - Gray - Blue |
- White - Black - Blue - Purple |
| Fingerprint sensor | Yes In-Display | Yes, In-Display |
Screen-to-body ratio
Performance
| Chipset | Samsung Exynos 2100 | MediaTek Dimensity 7400 Ultra |
| Max Frequency | 2900 MHz | 2600 MHz |
| CPU Cores | 8 (1 + 3 + 4) | 8 (4 + 4) |
| Architecture | - 4/2.2 (Cortex-A55) - 3/2.81 (Cortex-A78) - 1/2.91 (Cortex-X1) |
- 4/2 (Cortex-A55) - 4/2.6 (Cortex-A78) |
| Process | Samsung | TSMC |
| Transistor Size | 5 nm | 4 nm |
| Neural Processor | Yes | MediaTek APU 655 |
| Graphics | Mali-G78 MP14 | Mali-G615 MP2 |
| GPU Cores | 896 | 256 |
| GPU Frequency | 854 MHz | 1300 MHz |
| FLOPS | 1530.4 GFLOPS | 665.6 GFLOPS |
| Geekbench 6 (Single-Core) | 1449 | 1029 |
| Geekbench 6 (Multi-Core) | 3892 | 2915 |
| CPU | 232358 | 224809 |
| GPU | 256356 | 179080 |
| Memory | 163007 | 132205 |
| UX | 191217 | 172330 |
| NanoReview Score | 843008 | 708424 |
| Max Surface Temp. | 40.8 °C | n/a |
| Stability | 69 % | n/a |
| Graphics Test | 31 fps | n/a |
| Graphics Score | 5221 | n/a |
Memory
| RAM Size | - 12 GB - 16 GB |
8 GB |
| Memory Type | LPDDR5 | LPDDR4X |
| Memory Frequency | 2750 MHz | 2133 MHz |
| Channels | 2 | 2 |
| Storage Capacity | - 128 GB - 256 GB - 512 GB | 256 GB |
| Storage Type | UFS 3.1 | UFS 2.2 |
| Memory Card | No | No |
Software
| OS | Android 11 (Upgradeable to Android 14) | Android 15 |
| OS Size | 26.4 GB | n/a |
| UI Skin | One UI 6 | HyperOS 2.0 |
Battery
| Volume | 5000 mAh | 7000 mAh |
| Max Charging Power | 25 W | 45 W |
| Battery Type | Li-ion | Silicon Carbon (Si/C) |
| Removable | No | No |
| Wireless Charging | Yes (15 W) | No |
| Reverse Charging | Yes (Wireless) | Yes |
| Fast Charging | Yes (54% in 30 min) | Yes |
| Full Charge Time | 1:11 h | n/a |
| Web Browsing | 07:58 h | n/a |
| Video Playback | 13:59 h | n/a |
| Games | 05:14 h | n/a |
| Standby Mode | 111 h | n/a |
Main camera
| Matrix | 108 MP | 50 MP |
| Photo resolution | 12000x9000 pixels | n/a |
| Zoom | Optical, 10x | Digital |
| Flash | Dual LED | LED |
| Stabilization | Optical | Optical |
| 8K Recording | Up to 24FPS | No |
| 4K Recording | Yes (Up to 60 fps) | Yes (Up to 30 fps) |
| 1080p Recording | Yes (Up to 60 fps) | Yes (Up to 60 fps) |
| Slow Motion | 960 fps (720p) | 240 fps (720p) |
| Wide-angle lens | 120 ° | 112 ° |
| Lenses count | Standard: 108 MP Telephoto: 10 MP Telephoto: 10 MP Ultra-wide: 12 MP |
Standard: 50 MP Ultra-wide: 8 MP |
| Features | - Bokeh effect - Pro mode - RAW support |
- Bokeh effect - Pro mode |
| Matrix | 108 MP | 50 MP |
| Aperture | f/1.8 | f/1.5 |
| Focal length | 26 mm | n/a |
| Sensor | Samsung S5KHM3 | n/a |
| Sensor size | 1/1.33 | 1/2 |
| Pixel size | 0.8 μm | 1.6 μm |
| Autofocus | Laser autofocus | Phase autofocus |
| Stabilization | Optical | Optical |
| Matrix | 10 MP | n/a |
| Aperture | f/4.9 | n/a |
| Focal length | 240 mm | n/a |
| Sensor | Samsung S5K3J1 | n/a |
| Sensor size | 1/2.65 | n/a |
| Pixel size | 1.22 μm | n/a |
| Stabilization | Optical | n/a |
| Matrix | 12 MP | 8 MP |
| Aperture | f/2.2 | n/a |
| Focal length | 13 mm | n/a |
| Sensor | Sony IMX563 | n/a |
| Sensor size | 1/2.55 | n/a |
| Pixel size | 1.4 μm | n/a |
| Stabilization | Digital | Digital |
| Bokeh | 70 | n/a |
| Preview | 67 | n/a |
| Zoom | 106 | n/a |
Front camera
| Matrix | 40 MP | 20 MP |
| Photo resolution | 7864x5200 pixels | n/a |
| Aperture | f/2.2 | n/a |
| Focal length | 26 mm | n/a |
| Sensor | Samsung S5KGH1 | n/a |
| Sensor size | 1/2.65 | n/a |
| Pixel size | 0.7 μm | n/a |
| Autofocus | Phase autofocus | No |
| Stabilization | Digital | Digital |
| Video resolution | 2160p (4K) at 60 fps | 1080p (Full HD) at 60 fps |
| TOF 3D sensor | No | No |
Connectivity
| Wi-Fi version | Wi-Fi 6E (802.11 a/b/g/n/ac/ax) | Wi-Fi 6 (802.11 a/b/g/n/ac/ax) |
| Wi-Fi features | - Dual Band - Wi-Fi MiMO - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display |
- Dual Band - Wi-Fi MiMO - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display |
| Bluetooth version | 5.2 | 5.4 |
| Bluetooth features | LE, A2DP | LE |
| USB type | USB Type-C | USB Type-C |
| USB version | 3.2 | 2 |
| USB features | - Charging - USB Storage Mode - USB-Host mode - OTG |
- Charging - USB Storage Mode - OTG |
| GPS | - GPS - GLONASS - Beidou - Galileo |
- GPS - GLONASS - Beidou - Galileo - QZSS |
| NFC* | Yes | Yes |
| Infrared Port | No | Yes |
| SIM Count* | 2 | 2 |
| SIM Type | Nano | Nano |
| SIM Mode | Dual SIM Standby | Dual SIM Standby |
| eSIM Support * | Yes | No |
| Hybrid Slot | No | No |
| 2G Bands | GSM 850, 900, 1800, 1900 MHz | n/a |
| 3G Bands | WCDMA Band 1, 2, 4, 5, 8 | n/a |
| LTE Bands* | LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B32/B38/B39/B40/B41/B66) | n/a |
| LTE category | 24 | n/a |
| 5G Support | Yes | Yes |
Sound
| Speakers | Stereo | n/a |
| 3.5 mm Jack | No | No |
| FM Radio | No | No |
| Dolby Atmos | Yes | n/a |
Other
| Class | Flagship | Mid-range |
| Announced | January, 2021 yr | August, 2025 yr |
| Release Date | February, 2021 yr | August, 2025 yr |
| Launch Price ($) | 1200 | n/a |
| Sensors | - Hall Sensor - Barometer - Proximity Sensor - Gyroscope - Accelerometer - Ambient Light Sensor - Compass - Fingerprint sensor |
- Proximity Sensor - Gyroscope - Accelerometer - Ambient Light Sensor - Compass - Fingerprint sensor |
| Charger Included | n/a | Yes, 45 W |
*
Attention!
Config, frequencies, NFC, and other specs may vary by region.
Results
No clear favorite identified yet; updates may follow as new data arrives.
Survey
Total Votes: 0
