I changed from a B4 to the CR at the end of 2008 and stuck with it into spring of this year before I went back to the B4.
I loved the amount of rear grip it had, but could never get it to stay on line through a corner - indoors or out.
Apart from that it there wasn't much to choose between the two.
Happy to chat about it this Friday if you want.
PS: Get a B4!
