I am demoing the Yonex VCore Tour 89 this weekend. I have been playing with the Head Youtek Prestige Mid for the past 18 months. Nothing wrong with the Mid but the 18 x 20 string pattern seems too dense to me sometimes on a 93 head. How difficult of a switch would it be to go to a 89 head size versus 93. When I stack up the frames together, there is hardly any visual difference. Has anyone recently made the switch? The specs of both rackets seems almost identical. Your reply is appreciated.