Compare phones
| Global Score | |
| 84.1 | 90.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | Android 14 |
| 2020-03-23 | -- |
| 6.26 x 2.96 x 0.35 inches | -- |
| 6.63 ounces | -- |
| Midnight blue and Raven black | -- |
| Plastic and Plastic | Glass (Corning Gorilla Glass) and Titanium |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 6.4 inches | 6.8 inches |
| 2340 x 1080 pixels | 3088 x 1440 pixels |
| Super AMOLED | Dynamic AMOLED |
| 403 pixels per inch | 501 pixels per inch |
| 420 cd/m2 brightness | 2600 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.4 | 10.2 |
| Performance | |
| Exynos 9611 chipset | Qualcomm Snapdragon 8 Gen 4 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | processor |
| 4 GB RAM | 12 GB RAM |
| Mali-G72 MP3 GPU | Yes GPU |
| 9.27 | 6.21 |
| Storage | |
| 64 GB internal memory | 256 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 11.74 | 13.3 |
| Camera | |
| 48.00 MP + 20.00 MP | 200.00 MP + 12.00 MP |
| f/2.00 aperture | f/1.70 aperture |
| 26.00mm focal length | 24.00mm focal length |
| 0.5 inches (1/2") sensor | 0.77 inches (1/1.3") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 7680 x 4320 (30 fps) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 11.55 | 14.74 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA |
| Nano SIM, Dual SIM | Nano SIM |
| 6.7 | 10.6 |
| Battery Life | |
| 6000mAh Li - Polymer Battery | 5000mAh Li - Ion Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 7.52 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.3 |
| GPS | GPS |
| -- | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
The Galaxy S25 Ultra is slightly better than Galaxy M21, with a 90.7 score against 84.1. Both of these devices have Android operating system, but the Galaxy S25 Ultra has newer 14 version and Galaxy M21 has Android 11 version, so it counts with some nice extra features. The Galaxy S25 Ultra is a much thinner and lighter cellphone than Galaxy M21.
Galaxy M21 counts with a much greater processing power than Galaxy S25 Ultra, although it has a lower amount of RAM memory, they both have the same number of cores. The Galaxy S25 Ultra has an incredibly better looking screen than Samsung Galaxy M21, because it has much more brightness, a higher resolution of 1440 x 3088, a little bit bigger screen and a little bit higher pixels density.
The Galaxy S25 Ultra has a bigger storage capacity for games and applications than Galaxy M21, because although it has no SD card slot, it also counts with 192 GB more internal memory. The Galaxy S25 Ultra captures greater pictures and videos than Galaxy M21, because it has a much higher video quality, a bigger aperture, a way larger sensor which offers a lot better photo and video quality and a lot more mega pixels back facing camera.
Galaxy M21 features greater battery performance than Samsung Galaxy S25 Ultra, because it has a 20 percent larger battery size.
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