Compare phones
| Global Score | |
| 73 | 91.8 |
| Basic Information | |
| Sony | Samsung |
| Android 4.4.2 | Android 11 |
| -- | 2021-01-29 |
| 5.39 x 2.83 x 0.43 inches | 5.97 x 2.80 x 0.31 inches |
| 5.75 ounces | 6.03 ounces |
| Black, Blue and White | Gray, Phantom pink, Violet and White |
| -- | Aluminum and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 249.00 | $ 722.00 |
| Display / Screen | |
| 5 inches | 6.2 inches |
| 1080 x 1920 pixels (Full HD) | 2400 x 1080 pixels |
| IPS LCD | Dynamic AMOLED |
| 441 pixels per inch | 424 pixels per inch |
| -- | 1300 cd/m2 brightness |
| Capacitive, Multi-touch | No touch screen |
| 9.1 | 9.2 |
| Performance | |
| Qualcomm Snapdragon 801 8974-AB chipset | Qualcomm Snapdragon 888 chipset |
| Krait 400 (Quad-Core 2300 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 3 GB RAM | 8 GB RAM |
| Adreno 330 (450 MHz) GPU | Adreno 660 GPU |
| 9.27 | 9.63 |
| Storage | |
| 16 GB internal memory | 128 GB internal memory |
| microSD, microSDHC, microSDXC (up to 128 GB) external memory slot | No SD card slot |
| 6.72 | 10.1 |
| Camera | |
| 20.70 MP + 0.30 MP | 12.00 MP + 10.00 MP |
| -- | f/1.80 aperture |
| -- | 26.00mm focal length |
| 0.43 inches (1/2.3") sensor | 0.57 inches (1/1.76") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 7680 x 4320 (24 fps) video resolution |
| 1280 x 720 (120 fps) (HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 9.24 | 10.78 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA+ (4G), HSDPA, HSUPA, EDGE, GPRS and GSM | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Micro SIM | Nano SIM |
| 7 | 10.7 |
| Battery Life | |
| 3000mAh Li-Ion Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 690 hours standby time 15 hours talk time | -- |
| 4.96 | 5.92 |
| Other Features | |
| Bluetooth 4.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| -- | 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 is way better than Xperia Z2a, with a 91.8 score against 73. These devices have Android OS (Operating System), but the Samsung Galaxy S21 has an older 11 version and Xperia Z2a has Android 4.4.2. The Samsung Galaxy S21 is a just a bit heavier but thinner phone than Xperia Z2a. The Galaxy S21 has just a little better processing power than Xperia Z2a, because although it has doesn't have an extra graphics co-processor, it also counts with a larger number of faster cores and a larger amount of RAM memory.
Galaxy S21 counts with a bit more vivid screen than Sony Xperia Z2a, because although it has a little bit less pixels per inch of screen, it also counts with a larger screen and a bit higher 1080 x 2400 resolution. The Galaxy S21 has much more storage capacity for applications, games, photos and videos than Sony Xperia Z2a, because although it has no slot for external memory cards, it also counts with 128 GB internal storage.
The Samsung Galaxy S21 has improved battery duration than Xperia Z2a, because it has 4000mAh of battery capacity. Galaxy S21 shoots better photographs and videos than Sony Xperia Z2a, because although it has a much less MP back camera, it also counts with a way bigger sensor taking lot higher quality photos and a way higher 7680x4320 video resolution.
The Samsung Galaxy S21 costs a lot more than Xperia Z2a, but it's still a great choice, as you can get a better phone for that extra money.
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