Compare phones
| Global Score | |
| 90.7 | 84.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 14 | Android 11, 10 |
| -- | 2020-03-23 |
| -- | 6.26 x 2.96 x 0.35 inches |
| -- | 6.63 ounces |
| -- | Midnight blue and Raven black |
| Glass (Corning Gorilla Glass) and Titanium | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 6.8 inches | 6.4 inches |
| 3088 x 1440 pixels | 2340 x 1080 pixels |
| Dynamic AMOLED | Super AMOLED |
| 501 pixels per inch | 403 pixels per inch |
| 2600 cd/m2 brightness | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 10.2 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 8 Gen 4 chipset | Exynos 9611 chipset |
| processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 12 GB RAM | 4 GB RAM |
| Yes GPU | Mali-G72 MP3 GPU |
| 6.21 | 9.27 |
| Storage | |
| 256 GB internal memory | 64 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 13.3 | 11.74 |
| Camera | |
| 200.00 MP + 12.00 MP | 48.00 MP + 20.00 MP |
| f/1.70 aperture | f/2.00 aperture |
| 24.00mm focal length | 26.00mm focal length |
| 0.77 inches (1/1.3") sensor | 0.5 inches (1/2") sensor |
| 7680 x 4320 (30 fps) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 14.74 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 10.6 | 6.7 |
| Battery Life | |
| 5000mAh Li - Ion Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 6.8 | 7.52 |
| Other Features | |
| Bluetooth 5.3 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| -- | FM Radio |
Comparison review
The Galaxy S25 Ultra has a global score of 90.7, which is just a bit better than the Galaxy M21's 84.1 general score. Both of these phones come with Android OS (operating system), but the Galaxy S25 Ultra has newer 14 version while Galaxy M21 has Android 11, so it gives you lots of additional features and improved performance. Galaxy S25 Ultra is a much lighter and extremely thinner phone than the Galaxy M21.
The Samsung Galaxy S25 Ultra has a much sharper display than Galaxy M21, because it has much more brightness, a little larger screen, a better 1440 x 3088 resolution and a little higher pixel quantity in each inch of display. Samsung Galaxy S25 Ultra features a better memory to store more apps and games than Galaxy M21, because although it has no SD extension slot, it also counts with 192 GB more internal memory capacity.
The Samsung Galaxy M21 has a really superior performance than Galaxy S25 Ultra, although it has less RAM, they both have the same number of cores. Galaxy S25 Ultra counts with a lot better camera than Galaxy M21, because it has a larger camera aperture to take better low-light captures and video, a much better resolution back facing camera, a way bigger camera sensor providing a much higher image quality and a way higher 7680x4320 video quality.
Galaxy M21 features superior battery lifetime than Galaxy S25 Ultra, because it has a 6000mAh battery size.
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