My two cents regarding the STO. I had the car for an afternoon, fitted with brand new Bridgestone Race semi slicks, only 9 deg celsius outside.
The car had one modification, the dealership uploaded the exhaust valve file of the Performante so no complaints about the sound. It's different from my Evo, more higher pitched which fits the car as it's lighter and more racey. My Ego sounds more like a bull.
Performance wise there is no difference at least on public roads, at higher speeds you can see the aero is slowing the car down when watching the YT videos which I personally care as I drive often on unrestricted German highways and enjoy the pull of my Evo even at speeds above 300km/h.
Traction was surprisingly good once I warmed up the tires, got them up to 40 degrees on the display despite the low outside temperature. For sure it's livelier at the rear but what do you expect from a 640hp RWD car. What surprised me more was when driving my car backt to back how RWD the EVO feels in sport mode, like an RWD car with very strong traction.
Steering feel was definitely better, no corruption by drive shafts, in long corners the car also felt more linear than the EVO, not quite on Porsche GT3 level. Brakes were fantastic, much more solid pedal feel, strong stopping power.
As a track car, it will surely perform, although tests show it's not that fast but a lot of fun. I don't want to know if you have an off how much it costs to replace the Cofango as it's a one piece carbon fiber part.
All in all, great car, looks are fantastic, car was in Verde Turbine (Panzergrün) but not worth the premium to upgrade from my Evo. Also considering there is not a lot of space for luggage already, in the STO it's non-existent so a long weekend in the mountains with the better half not possible anymore (which could also be a good thing, depends on the perspective).