Here are a couple videos at Putnam Park from this past weekend with10/10ths Motorsports. I'm running on OE Ferodo pads with SRF fluid. The top video is on the OE wheels with 295/30 square RE71R street tires. There isn't any big difference in overall chassis balance--the car felt amazing on the OE Goodyears, and it's even better on the Bridgestones. Overall lateral grip is a little better (not big difference), longitudinal grip is definitely better (straight line braking/accel), and wet grip is much improved. I certainly wouldn't replace the Goodyears until they're thoroughly worn out, but the RE71R is a great option when you are in need of tires. These aren't my best laps on the RE71R, I forgot to turn in PDR for those! The AIM solo got em though, 1:16.2. The car is 1:15 capable on street tires.
The second video is on fairly used up 280mm square take off Yokohama slicks. The car was definitely faster on the slicks, but they are at the end of their life and not feeling great. With fresher take-offs the car easily could drop 1.5-2.5 seconds per lap. Also, don't forget... my wheel/tire package on slicks is 5.5% smaller OD than stock, so my speedometer is 5.5% fast. 140 mph= 132.3mph