At one point or another I've used both versions of the Pure Drive Roddick. I actually liked both frames and can't remember now why I left the cortex version but my arm started killing me when I was using the PDR GTs. I prefered the GTs over the cortex beacuse I left they hit a crisper ball and I just felt that I hit a cleaner ball overall with the GT version. Just curious if anyone out there who's played with these frames chose to play the cortex version over the GT version, and if so- why? My current racquets are great frames, I just miss the power my PDRs provided me with and the bombs I could consistandly hit when serving.