If you put these in an S, and want heat, you'll need to upgrade your BCM. The mid-line BCM in the S doesn't have the power pins for seat heating. I haven't looked at closely at the power movement wiring but I would not guess
it comes from the BCM.
As far as physically bolting in... anything from any Mk7 Golf or variant will fit. So will the seats from the A3/S3 of the same era, even the RS3 (imported)... see here, drool
There were plug/wiring changes between the 7 and 7.5. Nothing I would consider a huge deal but worth noting if you don't want to do any wiring.
I have reason to believe MK8 seats will also fit. If I can find a set for a decent price they will end up in my car, heated and cooled. The cooling function requires a facelift BCM, not just a highline. For other reasons I already have the facelift BCM taken care of
At that point my imported GTD seats will be up for sale. They'll plug right into a Golf S. In fact, you'll have an unused wire because the GTD seats, like GTI plaids, have no power functions, not even recline.