I would do the CC in a heartbeat if I had the change and it was available, matter of fact I did consider it for a Ford based pattern but my rims weren't big enough. Why are you guys comparing the prices of Ferrari and Porsche with GM, are they comparable, retail to retail and used to used?
Lets do a weight comparo. Currently my discs are front 1 3/8 x 12 and weigh 14#, the rears are 1 1/4 x 12 and weigh 11#. That might have changed to a lighter weight as I changed them out to a floating design and the rotors used less internal fins and were lighter I believe. Lets say the difference per corner is 10#, that's 40# total, all unsprung and rotating weight which relates to quicker acceleration and deceleration, and probably better directional change and all those other road holding tidbits. The CC stuff and the rotors they replace are larger in diameter so the perceived driving differences and weights could be greater. On a 3000#+ Porsche or Ferrari that might not mean much but the RCR cars are quite a bit lighter.
So lets say you put a lighter clutch and flywheel on, plus the CC brakes. This is all rotating weight and worth a bit of perceived HP and also noticeable deceleration so you actually use the brakes less.
I've not driven a setup with CC brakes but did have experience with something similarly lightweight in the wheel and drivetrain category and the experience is worth it, it is available 100% of the time.