| Global Score | |
| 81.5 | 98.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 13 | Android 11 |
| -- | 2021-01-29 |
| 6.43 x 3.07 x 0.35 inches | 6.50 x 2.98 x 0.35 inches |
| -- | 8.04 ounces |
| -- | Phantom black and Silver |
| Aluminum and Glass | Aluminum and Glass (Corning Gorilla Glass Victus) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 966.00 |
| Display / Screen | |
| 6.8 inches | 6.8 inches |
| 3080 x 1440 pixels | 3200 x 1440 pixels |
| Dynamic AMOLED | Dynamic AMOLED |
| 500 pixels per inch | 516 pixels per inch |
| -- | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 8 | 9.8 |
| Performance | |
| Qualcomm Snapdragon 8 Gen 2 (4 nm) chipset | Qualcomm Snapdragon 888 chipset |
| processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 8 GB RAM | 12 GB RAM |
| Adreno 740 GPU | Adreno 660 GPU |
| 6.21 | 9.72 |
| 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 + 40.00 MP | 108.00 MP + 40.00 MP |
| f/1.70 aperture | f/1.80 aperture |
| 69.00mm focal length | 24.00mm focal length |
| 0.77 inches (1/1.3") sensor | 0.75 inches (1/1.33") sensor |
| -- | 7680 x 4320 (24 fps) video resolution |
| -- | 1280 x 720 (960 fps) (HD) slow motion video |
| 12.43 | 13.75 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | 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 |
| 10.6 | 10.7 |
| Battery Life | |
| 5000mAh Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 6.8 | 6.8 |
| Other Features | |
| Bluetooth 5.2 | Bluetooth 5.1 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Samsung Galaxy S21 Ultra is way better than the Samsung Galaxy S23 Ultra, having a 98.1 score against 81.5. The Samsung Galaxy S21 Ultra is a a lot heavier device than the Samsung Galaxy S23 Ultra, but both of them are 0.35inches thick. These phones have Android OS (operating system), but Samsung Galaxy S21 Ultra has the previous 11 version while Samsung Galaxy S23 Ultra has Android 13.
Samsung Galaxy S21 Ultra counts with a much more vibrant display than Samsung Galaxy S23 Ultra, and although they both have a same size screen, the Samsung Galaxy S21 Ultra also has a just a bit higher screen density and a bit higher resolution of 1440 x 3200 pixels. Galaxy S21 Ultra features a much powerful CPU than Samsung Galaxy S23 Ultra, and although they both have the same number of cores, the Galaxy S21 Ultra also has a higher amount of RAM memory.
Samsung Galaxy S21 Ultra takes much clearer videos and photos than Galaxy S23 Ultra, although it has a much lower resolution camera, a tinier camera aperture which is not recommended for low-light captures and video and a tinier sensor which offers a worse photo and video quality. The Galaxy S21 Ultra has as much storage for apps and games as Galaxy S23 Ultra, both have equal internal storage capacity.
Galaxy S21 Ultra's battery lifetime is just as good as the Galaxy S23 Ultra one.
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