The 8.0 is powered by a Snapdragon 652 processor, wheras the 10 was using a Mediatek 8176 CPU. In addition, this model will ship with Android 7.1 Nougat, with its larger cousin still stuck on 6.0 Marshmallow.
The 3S 8.0 also has a 7.9" 2K display, 5MP front camera, and 13MP back camera. Depending on what model you buy, you will get either 3GB RAM/32GB storage or 4GB RAM/64GB storage. The tablet seems to have a rather small battery, at just 4,680mAh, but maybe the power-efficient Snapdragon processor will help with battery life.
