Positive pedal feel is probably more like it. But when I called Stoptech, the guy there specifically told me not to buy the WRX kit, b/c they are specifically designed for that car. Not saying you won't see any "positive gains" or anything, I just think you'll see much better benefits if you go with the one designed for our car (since the piston sizing differs from the wrx kit to the Legacy kit).
Just throwing it out there that the wrx kit is indeed the wrx kit, and just b/c it fits does NOT mean its specifically designed for the legacy...