The verdict
Your pick: BLU S91, ahead on Performance & hardware, Connectivity and Battery & charging. Unless Camera decides it for you.
| Category | G51S | S91 |
|---|---|---|
| Design & display | 4.7 | 4.5 |
| Performance & hardware | 1.2 | 3.0 |
| Camera | 3.3 | 2.0 |
| Connectivity | 3.7 | 4.6 |
| Battery & charging | 3.8 | 5.6 |
Which one is for you?
BLU G51S, if you care about…
- Weight
- 185 g
- against 202 g
BLU S91, if you care about…
- Battery Capacity
- 5,000 mAh
- against 4,000 mAh
- RAM Capacity
- 4 GB
- against 2 GB
- Wi-Fi Standards
- Wi-Fi 802.11a/b/g/n, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)
- against Wi-Fi 802.11 b/g/n
- Bluetooth Version
- Bluetooth 5.0
- against Bluetooth 4.2
Specification comparison
Performance
| Specification | G51S | S91 |
|---|---|---|
| Processor Model | Unisoc SC9863A | MediaTek Helio G25 |
| Processor Process Size | 28 nm | 12 nm Best value |
| Graphics GPU | PowerVR GE8322 | PowerVR GE8320 |
| Storage Type | eMMC 5.1 | eMMC 5.1 |
| Maximum CPU Clock | 1.6 GHz | 2 GHz Best value |
| Maximum Storage Capacity | 32 GB | 128 GB Best value |
| AnTuTu Score | 112,545 | 127,700 |
| Geekbench 6 Single-Core | — | 185 |
| Geekbench 6 Multi-Core | — | 521 |
| CPU Description | Octa-core Cortex-A55 CPU, with four cores at 1.6 GHz and four cores at 1.2 GHz. | Octa-core CPU with 4 Cortex-A53 cores at 2.0 GHz and 4 Cortex-A53 cores at 1.5 GHz |
| Processor Type | Octa-Core | Octa-Core |
| 64-Bit Processor | Yes | Yes |
| RAM Capacity | 2 GB | 4 GB Best value |
| RAM Type | — | DDR4 |
| Expandable Storage | Yes | Yes |
| AnTuTu version | v9 | — |
Design
| Specification | G51S | S91 |
|---|---|---|
| Body Colors | Bronze, Blue, Green, Red | Black, Green |
| Body Thickness | 9 mm | 8.9 mm Best value |
| Body Width | 77.5 mm | 76.3 mm |
| Body Height | 162.4 mm | 164.8 mm |
| Weight | 185 g Best value | 202 g |
| Usable Surface | 79.9 % | 81.1 % Best value |
| Body Materials | Plastic | — |
Battery
| Specification | G51S | S91 |
|---|---|---|
| Battery Capacity | 4,000 mAh | 5,000 mAh Best value |
| Battery Type | Li-Polymer | Li-Polymer |
| Battery Features | Fast Charging, Non-Removable | Battery Level Indicator, Rechargeable |
Display
| Specification | G51S | S91 |
|---|---|---|
| Display Aspect Ratio | 19.5:9 | 20:9 |
| Display Technology | IPS LCD | IPS LCD |
| Display Diagonal | 6.4″ | 6.5″ Best value |
| Display Horizontal Resolution | 720 px | 720 px |
| Display Vertical Resolution | 1,560 px | 1,600 px Best value |
| Display Pixel Density | 268 ppi | 270 ppi Best value |
| Display Features | IPS LCD, Water Drop Notch, Curved Glass, Capacitive Touch, Multi-Touch | IPS LCD, Touchscreen |
Sensors
| Specification | G51S | S91 |
|---|---|---|
| Fingerprint Sensor Placement | Rear | Rear |
Sensor
| Specification | G51S | S91 |
|---|---|---|
| Sensor Features | Fingerprint Sensor, Accelerometer, Light Sensor, Proximity Sensor | Fingerprint Sensor, Accelerometer, Gyroscope, Compass, Proximity Sensor |
Software
| Specification | G51S | S91 |
|---|---|---|
| Operating System | Android 11 | Android 11 |
| OS Family | Android | Android |
| OS Version | 11 | 11 |
| Google Services | Yes | — |
Connectivity
| Specification | G51S | S91 |
|---|---|---|
| SIM Configurations | Dual Nano-SIM, Dual SIM Dual Standby | Dual Nano-SIM |
| Cellular Bands | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS B1, 3G UMTS B2, 3G UMTS B3, 3G UMTS B4, 3G UMTS B5, 3G UMTS B8, 3G UMTS 1700 AWS, 4G LTE B1, 4G LTE B2, 4G LTE B3, 4G LTE B4, 4G LTE B5, 4G LTE B7, 4G LTE B12, 4G LTE B17, 4G LTE B28A | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS B850, 3G UMTS B900, 3G UMTS 1700 AWS, 3G UMTS 1900, 3G UMTS 2100, 4G LTE B1, 4G LTE B2, 4G LTE B3, 4G LTE B4, 4G LTE B5, 4G LTE B7, 4G LTE B12, 4G LTE B13, 4G LTE B17, LTE B28, 4G LTE B66 |
| Cellular Technologies | GSM, HSPA, LTE | GSM, HSPA, UMTS, LTE, 4G |
| Wi-Fi Standards | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11a/b/g/n, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac) Best value |
| Wi-Fi Features | Wi-Fi Direct, Wi-Fi Hotspot, Wi-Fi 802.11 b/g/n | Wi-Fi Direct, Wi-Fi 802.11a/b/g/n |
| Bluetooth Version | Bluetooth 4.2 | Bluetooth 5.0 Best value |
| Bluetooth Profiles | A2DP, LE | A2DP, LE |
| Navigation Systems | GPS, A-GPS | GPS, Galileo |
| Connectivity Features | 3.5 mm Audio Jack, FM Radio, USB Type-C, Computer Sync, OTA Sync, Tethering, USB Charging, USB Mass Storage | 3.5 mm Audio Jack, FM Radio, USB Type-C, USB OTG |
| USB Version | USB 2.0 | USB 2.0 |
| SAR American Head | 0.981 W/kg | — |
| SAR American Body | 0.67 W/kg | — |
| Max. download speed | — | 150 Mbps |
| Max. upload speed | — | 50 Mbps |
Audio
| Specification | G51S | S91 |
|---|---|---|
| Audio Features | A2DP, LE, Loudspeaker | Loudspeaker |
