They would be cheaper......but not cheap!!
I priced them up and they are about £300+ for discs and £120+ for pads.
They should help lots around the Ring tho!!!! pardon the expression.
JBS Autodesigns have the Porsche brakes on their demo Leon. There is a thread on here about the car and some pics of thre brakes.
Err EBC do a set of slotted discs for the R32, 345mm, plus a set of Red Stuff pads comes to £302.93...