Golf clubs

What are some of the different between the 910D2 and 913D2 

Well first off is the looks. The weights are a different shape from the 910 series. The face of the club is to increase club speed. 

The new 913's are more forgivable, offer better work-ability, and offer more distance than the previous models.  The 913 also has a larger face to create a hotter COG which creates the distance.  Due to the larger club face, you are also going to have a more consistent ball flight, and won't notice the off center hits as much.  I hope that this will help!

The bezel weight has changed shape to help move the MOI a litte further back.  The 913 D2 should test out for you with some less spin and improved launch characteristics.  Probably a couple of more yards on center and improved control/distance on certain mishits because of a larger sweet spot on the face.  The stock shafts have been upgraded/revamped from the 910 offerings.  

Christian J

The new 913's are more forgivable, offer better work-ability, and offer more distance than the previous models.  The 913 also has a larger face to create a hotter COG which creates the distance.  Due to the larger club face, you are also going to have a more consistent ball flight, and won't notice the off center hits as much.  I hope that this will help!

+1. The biggest thing I've noticed is how much more forgiving the 913 is.