| Global Score | |
| 87.4 | 80.1 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 5.0 | Android 15 |
| 2015-04-11 | -- |
| 5.65 x 2.78 x 0.27 inches | -- |
| 4.87 ounces | -- |
| Black, Blue, Gold and White | -- |
| Aluminium and Glass | -- |
| Scratch-Resistant Glass | -- |
| $ 252.00 | -- |
| Display / Screen | |
| 5.1 inches | 6.7 inches |
| 1440 x 2560 pixels (Quad HD / 2K) | -- |
| Super AMOLED | AMOLED |
| 576 pixels per inch | -- |
| -- | 3000 cd/m2 brightness |
| Capacitive, Multi-touch | No touch screen |
| 9.9 | 5 |
| Performance | |
| Exynos 7 Octa 7420 chipset | Qualcomm Snapdragon 8 Elite SM8750-AB (4 nm) chipset |
| 64-bit ARM Cortex-A57 (Quad-Core 2100 MHz + Quad-Core 1500 MHz) processor | processor |
| 3 GB (1600 MHz) RAM | 16 GB RAM |
| Mali-T760 MP8 (650 MHz) GPU | Adreno 830 GPU |
| 10.08 | 6.3 |
| Storage | |
| 128 GB internal memory | 512 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 17.6 |
| Camera | |
| 16.00 MP + 5.00 MP | 200.00 MP + 32.00 MP |
| f/1.90 aperture | -- |
| 28.00mm focal length | -- |
| 0.38 inches (1/2.6") sensor | -- |
| 3840 x 2160 (30 fps) (4K) video resolution | 7680 x 4320 (30 fps) video resolution |
| -- | 1920 x 1080 (1920 fps) (Full HD) slow motion video |
| 10.01 | 12.87 |
| Networks | |
| Wi-Fi | -- |
| Mobile Hotspot | -- |
| LTE-A (4G), LTE (4G), HSPA, HSUPA, UMTS, EDGE, GPRS and GSM | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA |
| Nano SIM, Dual SIM | Nano SIM |
| 6.7 | 7.6 |
| Battery Life | |
| 2550mAh Battery | 6000mAh Si - Carbon Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 4.56 | 7.52 |
| Other Features | |
| Bluetooth 4.1 | Bluetooth 5.4 |
| GPS | GPS |
| NFC | NFC |
| Infra-red port | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
The Galaxy S6 is a little bit better than the Xiaomi 15 Ultra (Rumored), having an 87.4 score against 80.1. Both phones in this review work with Android OS (operating system), but the Galaxy S6 has older 5.0 version while Xiaomi 15 Ultra (Rumored) has Android 15. Samsung Galaxy S6 has a much powerful CPU than Xiaomi 15 Ultra (Rumored), because although it has a lower amount of RAM, and they both have a Octa-Core CPU, the Samsung Galaxy S6 also counts with a 64-bit CPU and an additional graphics co-processor.
Galaxy S6 counts with a lot better display than Xiaomi 15 Ultra (Rumored), although it has a lot smaller screen. The Xiaomi 15 Ultra (Rumored) shoots much better photographs and videos than Samsung Galaxy S6, because it has a way better video definition and a much more MP back facing camera. Xiaomi 15 Ultra (Rumored) has much more storage to store more apps and games than Galaxy S6, because it has 384 GB more internal storage.
Xiaomi 15 Ultra (Rumored) has a much better battery life than Galaxy S6, because it has a 6000mAh battery size instead of 2550mAh.
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