Weight can effect your ball speed and rotation. I agree that the 14 and 15 will carry about the same but, you need to take into consideration that the 14 will deflect more if your speed is low. 14MPH and under. It will be easier to rev up the 14# for more hook but at the same time it is also just as easy to over throw the ball because its lighter.
I used to throw 16#. About 2 years ago I decided that I wanted to drop from 16 to 15#. Best move I have ever done. I gained 20 pins to my average, I am more accurate, and I can throw the same shot (within 3-4boards). ( I have an area shot thats about 10 boards wide)
