Compare phones
| Global Score | |
| 91.8 | 82.6 |
| Basic Information | |
| Samsung | Samsung |
| Android 11 | Android 14 |
| 2021-01-29 | -- |
| 5.97 x 2.80 x 0.31 inches | -- |
| 6.03 ounces | -- |
| Gray, Phantom pink, Violet and White | -- |
| Aluminum and Plastic | Aluminum and Glass (Corning Gorilla Glass Victus 2) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 722.00 | $ 800.00 |
| Display / Screen | |
| 6.2 inches | 6.2 inches |
| 2400 x 1080 pixels | 2340 x 1080 pixels |
| Dynamic AMOLED | Dynamic AMOLED |
| 424 pixels per inch | 416 pixels per inch |
| 1300 cd/m2 brightness | 2600 cd/m2 brightness |
| No touch screen | No touch screen |
| 9.2 | 9.7 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | Qualcomm Snapdragon 8 Gen 4 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | processor |
| 8 GB RAM | 8 GB RAM |
| Adreno 660 GPU | Yes GPU |
| 9.63 | 6.21 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 10.1 |
| Camera | |
| 12.00 MP + 10.00 MP | 50.00 MP + 12.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 26.00mm focal length | 24.00mm focal length |
| 0.57 inches (1/1.76") sensor | 0.64 inches (1/1.56") sensor |
| 7680 x 4320 (24 fps) video resolution | 7680 x 4320 (30 fps) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 10.78 | 12.54 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA |
| Nano SIM | Nano SIM |
| 10.7 | 10.6 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 4000mAh Li - Ion Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 5.92 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.3 |
| 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
The Galaxy S21 has a global score of 91.8, which is much better than Galaxy S25's 82.6 global score. Both of these devices come with Android OS (Operating System), but Galaxy S21 has the older 11 version and Galaxy S25 has Android 14 version. The Samsung Galaxy S21 has a really superior hardware performance than Samsung Galaxy S25. Both of them have a 8 GB RAM and the same number of cores.
The Samsung Galaxy S25 counts with a little bit better looking display than Galaxy S21, because although it has a bit lower resolution of 1080 x 2340px and a just a bit inferior quantity of pixels per inch in the screen, and they both have a same size screen, the Samsung Galaxy S25 also counts with way more screen brightness.
The Samsung Galaxy S25 shoots much better photos and videos than Samsung Galaxy S21, and although they both have the same video definition and a same size aperture, the Samsung Galaxy S25 also has better video frame rate, a lot more mega-pixels back facing camera and a larger back camera sensor which gives a higher image and video quality.
The Samsung Galaxy S25 has as much storage capacity for games and applications as Samsung Galaxy S21, both of them have exactly the same internal memory. The Samsung Galaxy S25 counts with a battery performance that is just as good as Galaxy S21's battery life.
Despite of being the best phone in our comparison, Samsung Galaxy S21 is also cheap compared to the Samsung Galaxy S25, which makes it an easy decision.
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