this is a good 4 min clip of me working to hang with a Ferrari 458 Challenge Car. This car is a full race car on slicks and has 570hp vs my 435 - it clearly walks away from me in the straights - but if you watch closely I think you'll see that I out-brake and out corner the car which isn't too shabby for my little GT3. I was also on tires are were "done" - they had 2 days of hard/fast driving on them and the car was loosey goosey all over the track. Careful observers will note that I'm on the 458's tail in more the technical sections of the track (even closing some distance) but it opens up a lead on the straights. The "chase" finally ended when the 458 got a fortuitous point-by and I couldn't follow due to passing rules. This allowed the Ferrari to get way out in front and there weren't enough laps for me to catch back up.
over all a fun fun day and I've never driven better.