I have both a 909 in 15.5 ° and a 910 in 15°. Both have a Matrix OZIK X-Con shaft. I find that the 910 feel a bit more solid and it seems to play a bit heavier, which I prefer. The adjustability is a nice feature on the 910, although I have mine set for A-1 and love the feel and ball flight. The 910 also makes trying different shafts a lot easier.

I would suggest that you fins a Titleist fitter and try a few different 910s and compare them during the fitting to your 909. You may find that the 909 is just the right club for you of that a properly fitted 910 is much better.

Best of Luck....