Denny:  The Diamana M+70 Red reg flex is a custom driver/fairway shaft and is 67 grams.  The Diamana M+60 Red reg flex is a standard driver shaft and is 55 grams.  The difference would 12 grams.  Cheers, Chuck......

Denny, The TT members are alright with their descriptions between the two shafts you asked about. In addition to it, here's Titleist web page with all the detailed information: http://www.titleist.com/golf-clubs/drivers/915D.aspx Scroll down till you see the shafts offered. The one other thing you should notice are the differences in "torque". I do believe that the higher rating or the number on the torque is on a shaft, the higher your ball launch will be. Thanks for the opportunity to answer your question. No'l