The 458 is so much better than the Superleggera, it's amazing. I would recommend you drive the Lambo first if possible so it's not a letdown.
Really well run operation.
Don't be afraid to give your instructor a little background on your driving experience. They will let you go pretty much as hard as you want. Just get a feel for the car and build up speed from there, though you will want to do this quickly as your laps are pretty limited.
Also, be sure to take a ride in the drift car, it's a ton of fun.