I have driven a 991 GT3 on the street and the car is still plenty fun. It feels like it makes more torque than it does. My guess because of the great gearing and the car is relatively light. The 458 italia only makes like 20 more ft lbs don't see people saying that's not a fun street car?
NA power > boost and that's coming from a guy with a boosted Z. I have driven a 458 plenty and was able to get behind the wheel of the 488 once and while that car is WAY faster I enjoyed the powertrain of the 458 more.
