The SLC handles great and is reasonably fast, a great car all around. But compared to the G60, it's a noseheavy sob, all the extra weight of the VR6 is in the front. It's still one f the best handling cars of all times.
Either way, the VR6 is NOT supercharged, it's a 2.8L naturally aspirated narrow angle V6. The G60 on the other hand is a supercharged 1.8L inline 4. The VR6 is an expencive engine to modify, but it's a strong engine that will get you a long way with forced induction.
Reliable, well...