"RS Magazine" (french) where they tested the convertible 997 with PCCB and then the convertible 997 S with standard brakes...... the journalist concluded that he would give up the extra 30 HP to have the PCCB ! The handling seemed to be so much better because of the loss of weight and much less over-steering. So there much improved handling also with these brakes ... I guess the best would be to have both especially if it improves handling .