I have the 910 D3 - 10.5 but recently tried the 913 D3 - 10.5. I hit the 913 higher with identical settings but different shafts. Is that typical of the 913 head or is it more a function of shaft? I have the Aldilas RIP in my 910 and it was one of the stock shafts in the 913, can't rmember which one.
I did try the 913 with the Titleist/Bassara stiff 50g high shaft and it performed great. Is there an upcharge for this shaft?