As per the leaked images, the mini version looks similar to the original Galaxy S6 in case of design. The exact screen size is not known, but the S6 mini could have a 4.6 or 4.7 inch screen and a have a 720p display. S6 mini will continue with the S6’s glass panels indicating that it will come without a microSD slot and non removable battery.
A previous GFXBench leak in May had stated that the the Samsung Galaxy S6 Mini will pack the Snapdragon 808 processor. Other specs rumored of the S6 Mini are 2GB RAM, 16GB internal memory, 16MP rear camera and 5MP front facing shooter. The device will run on Android 5.1.1. There is no official word on the release date of the Galaxy S6 Mini yet.