TW has the stiffness rating for the Pure drive as 70, while the aeropro drive is rated at 67. Has anyone played with both of these rackets and can tell me which is stiffer. After talking to Babolat, they seem to disagree with TWs stiffness rating on these rackets and I would agree with them from what I am hearing on feed back. I need to demo the aeropro drive but haven't gotten around to it yet. Babolat was kind enough to send me the specs on all their rackets and they have the aeropro drive rated stiffer. I understand that stiffness is perceived differently for everybody, I myself think the pure drive plus is more flexible than the rated 70 it gets. Any thoughts on this?