The beam is thicker, too... at least from the sounds of it.
Yonex won't tell me anything, I'll have to dig myself. And Tweeting them won't help; they don't respond.
Yonex VCORE Tour 89 w/ Volkl Cyclone 18 @ 48
Yonex EZONE Ai 98 w/ Yonex PolyTour HS 125 @ 45