The thread title is the opposite of what you are trying to say.
Anyway, when My rear PS2's were worn, I switched them out with PSS. Now it's been almost a year and a half since I've had PS2 Fronts and PSS Rears. At the limit, the car sometimes understeers since the fronts have less grip than the rears. Other than that I haven't had any issues. I love the PSS; they have more grip and they last double the amount of time/mileage compared to Conti3's and PS2's.
///M3 Mods: | Eisenmann Race Exhaust | Primary Cats Delete (TTP) | ESS Tune | 19" Advan RS | Eibach Springs | MS Air Filter | BMW Perf. Spoiler | BMW Perf. Splitters | Euro LCI Tail lights | Angel iBright v.3.0 | 20% Tint | Matte black Kidney Grills | CF Side Gills | Painted Reflectors | Black M3 emblem