Compare phones
| Global Score | |
| 72.6 | 91.8 |
| Basic Information | |
| Samsung | Samsung |
| Android 15 | Android 11 |
| -- | 2021-01-29 |
| -- | 5.97 x 2.80 x 0.31 inches |
| -- | 6.03 ounces |
| -- | Gray, Phantom pink, Violet and White |
| -- | Aluminum and Plastic |
| -- | Scratch-Resistant Glass |
| -- | $ 722.00 |
| Display / Screen | |
| 6.8 inches | 6.2 inches |
| -- | 2400 x 1080 pixels |
| AMOLED | Dynamic AMOLED |
| -- | 424 pixels per inch |
| -- | 1300 cd/m2 brightness |
| No touch screen | No touch screen |
| 2.7 | 9.2 |
| Performance | |
| Qualcomm Snapdragon 8 Elite SM8650 (4 nm) chipset | Qualcomm Snapdragon 888 chipset |
| processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 12 GB RAM | 8 GB RAM |
| Adreno 830 GPU | Adreno 660 GPU |
| 6.21 | 9.63 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 10.1 |
| Camera | |
| 200.00 MP + 10.00 MP | 12.00 MP + 10.00 MP |
| -- | f/1.80 aperture |
| -- | 26.00mm focal length |
| 0.64 inches (1/1.56") sensor | 0.57 inches (1/1.76") sensor |
| 7680 x 4320 (30 fps) video resolution | 7680 x 4320 (24 fps) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 13.42 | 10.78 |
| Networks | |
| -- | Wi-Fi |
| -- | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM |
| 7.6 | 10.7 |
| Battery Life | |
| 3050mAh Dual Nano SIM + eSIM Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 5.04 | 5.92 |
| Other Features | |
| Bluetooth 5.3 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
Samsung Galaxy S21 has a global score of 91.8, which is much better than Galaxy S25 Slim (Rumored)'s 72.6 overall score. Both devices in this comparison review come with Android OS, but the Samsung Galaxy S21 has an older 11 version while Galaxy S25 Slim (Rumored) has Android 15 version. Galaxy S21 counts with a much sharper screen than Galaxy S25 Slim (Rumored), although it has a little smaller display.
Samsung Galaxy S21 and Galaxy S25 Slim (Rumored) feature quite similar storage for games and applications, both of them have equal internal storage capacity. Galaxy S21 has a lot better hardware performance than Samsung Galaxy S25 Slim (Rumored), because although it has 4 GB less RAM, it also counts with a greater number of cores (and faster).
Samsung Galaxy S21 counts with better battery duration than Galaxy S25 Slim (Rumored), because it has a 4000mAh battery capacity. Galaxy S25 Slim (Rumored) takes a lot better photos and videos than Galaxy S21, and although they both have the same 7680x4320 video resolution, the Galaxy S25 Slim (Rumored) also has a lot higher resolution back camera, better video frame rates and a larger sensor capturing higher quality videos and pictures.
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