both have the same keys, a fatar tp40GH. If you look on Midi control center from arturia. You have 9 diferent sensitivity response to choose and more Stacatto and Píano Forte to configurate. I have no ideia about the S88 but I would look to the best warranty. is always good to have 1 or 2 years of warranty.
This kbd has pitch/mod wheels and key aftertouch, glide feature is a part of whatever plugin you're using. You can use pads for whatever thing you like, chords, drums or btns in your DAW.
