I've been throwing 15's for the last 4 years and just bought a 14 that's getting set up as I type.  The problem I've been having lately seems to be endurance, as hitting my mark in the 3rd game can be a bit frustrating.  I'm either yanking the heck out of it or dropping it wide and it just feels like the ball has been controlling me more than I've been controlling the ball.  I don't drink until after bowling, so you can take that variable out of the equation

So here are my questions to those of you that have thrown both.  How bad will my carry suffer, how much easier is it to control, do the benefits outweigh the drawbacks, or do you use them condition-specific.  I've heard pick one and stay with it but I see many with both for sale which tells me some people bounce back and forth.

Carry shouldn't suffer with today's equipment.  You may find that it changes slightly, though.  You may leave more 5-pins on lighter hits due to deflection while carrying more 9-pins on heavier hits because of it.  But in the long run, I don't think you'll see a difference.

SH