I drove these two yesterday.
Here's the funny thing, after driving fast Audi's @ Phillip Island a few weeks ago my car felt very slow after getting back in it at the end of the day. But yesterday my car didn't really feel slow after having driven both of those cars, which was a bit strange. Obviously it is slow compared to those supercars, but interesting nonetheless.
Also driving those supercars is nothing like driving a very fast 'normal' car (like an Audi). The Audi RS6 and R8 for example are basically faster versions of your average executive car, of course the experience is amazing, but they're still smooth and you could use them every day. By way of comparison, driving the (somewhat older) F430 and Series 2 Gallardo are more like driving racing cars, in that they are not really smooth or refined at all.