First of all, the alleged Galaxy Tab S2 will arrive in 8” and 9.7” displays, where the larger sized Samsung slate (model number SM-T819) has been revealed in a way over on GFXBench, and it purportedly boasts of a 1536 x 2048 display, an octa-core Qualcomm Snapdragon 652 SoC, Adreno 510 graphics, possibly 3GB of RAM, an 8-megapixel camera at the back, a 2-megapixel shooter in front, and Android 6.0.1 Marshmallow on board.
As for the smaller 8” SM-T719, it is tipped to arrive with similar processor and graphics chipsets alongside the same amount of RAM. I guess we will just have to sit tight and wait for the dust to settle at Mobile World Congress in Barcelona, Spain, later this month in order to get everything down in concrete.