Compare phones
| Global Score | |
| 74.6 | 98.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 8.0 Oreo | Android 11 |
| -- | 2021-01-29 |
| 6.04 x 3.04 x 0.32 inches | 6.50 x 2.98 x 0.35 inches |
| 6.14 ounces | 8.04 ounces |
| 16 777 216 | Phantom black and Silver |
| Plastic | Aluminum and Glass (Corning Gorilla Glass Victus) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 966.00 |
| Display / Screen | |
| 5.5 inches | 6.8 inches |
| 1280 x 720 pixels (HD) | 3200 x 1440 pixels |
| Super AMOLED | Dynamic AMOLED |
| 267 pixels per inch | 516 pixels per inch |
| -- | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.1 | 9.8 |
| Performance | |
| Samsung Exynos 7 Octa 7884 chipset | Qualcomm Snapdragon 888 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1600 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 4 GB RAM | 12 GB RAM |
| ARM Mali-G71 GPU | Adreno 660 GPU |
| 8.82 | 9.72 |
| Storage | |
| 32 GB internal memory | 128 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | No SD card slot |
| 8.88 | 10.1 |
| Camera | |
| 13.00 MP + 8.00 MP | 108.00 MP + 40.00 MP |
| f/1.90 aperture | f/1.80 aperture |
| 27.00mm focal length | 24.00mm focal length |
| 0.33 inches (1/3.06") sensor | 0.75 inches (1/1.33") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 7680 x 4320 (24 fps) video resolution |
| -- | 1280 x 720 (960 fps) (HD) slow motion video |
| 9.02 | 13.75 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Micro SIM, Dual SIM | Nano SIM |
| 6.1 | 10.7 |
| Battery Life | |
| 3000mAh Battery | 5000mAh Li - Polymer Battery |
| Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 4.96 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.1 |
| GPS | GPS |
| -- | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Galaxy S21 Ultra is much better than the Samsung Galaxy J7 Duo, getting a 98.1 score against 74.6. Both phones in our current comparison come with Android OS (operating system), but Galaxy S21 Ultra has the older 11 version and Samsung Galaxy J7 Duo has Android 8.0 Oreo. Galaxy S21 Ultra is a just a bit thicker and incredibly heavier cellphone than Samsung Galaxy J7 Duo.
Galaxy S21 Ultra features a better processing unit than Galaxy J7 Duo, and although they both have 8 processing cores, the Galaxy S21 Ultra also has a greater amount of RAM. The Samsung Galaxy S21 Ultra counts with a way better looking screen than Samsung Galaxy J7 Duo, because it has a lot better amount of pixels per inch in the display, a larger display and a much better resolution of 1440 x 3200.
Galaxy S21 Ultra shoots greater photographs and videos than Samsung Galaxy J7 Duo, because it has a way better video resolution, a larger aperture for better low-light photography, a camera in the back with lot more megapixels and a way larger sensor which provides a much better photo and video quality.
The Galaxy S21 Ultra has a quite bigger memory to store more apps and games than Samsung Galaxy J7 Duo, because although it has no SD card slot, it also counts with 128 GB internal memory. The Galaxy S21 Ultra counts with a much better battery performance than Galaxy J7 Duo, because it has a 5000mAh battery capacity against 3000mAh.
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