both run the Android Jelly Bean (4.2).
The Tecno S7 has a MT6572 1.0GHz Dual-core, while
the Tecno S9 has 1.3 GHz Dual-core.
all support GPRS, EDGE, 3G.
all have WiFi support.
both have Bluetooth capability.
both have a 4GB internal memory.
Tecno S7 has a 512MB RAM, while the Tecno S9 has a 1GB RAM size.
both come with free 8GB and expandable microSD
of up to 32GB
Tecno S7 has a 5.0MP back camera, while the Tecno S9 has 0.3MP
Tecno S7 has a 1.3MP front camera while the Tecno S9 has a 2.0MP front camera.
both have flash for the back camera.
Tecno S7 has a 5.0” screen while the Tecno S9 has a 7.0” screen.
S7 comes with an 2000mAH battery, while the Tecno S9 comes with a 3000mAH
both have the G-Sensor, Proximity sensor, Light sensor.
all have the 3.5mm port for earphone capabilities.
Tecno S7 price range is from 19,000-25,000 while the Tecno S9 price range is
from 24,000 to 30,000
Tecno S7 has a 512MB while the Tecno S9 has a 1GB RAM. The Tecno S9 has a
1.3GHz dual core processor while the Tecno S7 has a 1GHz dual core processor.
Tecno S7 has a 2000mAH battery while the Tecno S9 has a 3000mAh, The Tecno S9
possess an edge over the S7 in this area.
comment below to choose the one you prefer and what you do not like about them.