I've been thinking of going to MINI's BBK with the JCW and GP2 brakes, but I'm not sure what the difference is between the rotors/calipers are compared to the MCS rotors/calipers. What I'm wondering is, is there a huge difference between these rotors/calipers? Right now on my R56 I have OEM MINI rotors with OEM calipers and I'm running Hawk HPS pads. I'm running this combo because when I had my R53 this was the setup that I had when I was doing HPDEs pretty regularly, and will be doing a great deal of DEs with NASA GL this coming season. So should I or should I not slap on either the JCW rotors/calipers or GP2 rotors/calipers?