I was wondering about this myself.  I have three sets of shafts that I switch between in my 910 driver, fairway woods and hybrid (depending on course conditions, weather, etc.) that I'm happy with.  I'm not looking to switch anytime soon, but looking down the road, should I make the switch, I'm loathe to have to go through procuring those very expensive shaft tips for my personal shaft choices and having them re-fitted.

I'm hoping the hosel design will stay the same, but I'm not optimistic.

the surefit tour hosel in the 913 is the same as the 910

only on the driver can you change it

Marshall B

the surefit tour hosel in the 913 is the same as the 910

meth0d

Will my shaft from my 910D3 fit the new 913D3 head? 

Yes, your 910 driver shafts will fit in the new 913 drivers.

Cathi, Titleist Club Concierge

meth0d

Will my shaft from my 910D3 fit the new 913D3 head? 

Yes, your 910 driver shafts will fit in the new 913 drivers.

So the 913 fairway hosels will be different, then?