This is totally subjective.  Performance is truly dictated by your ability and what you are trying to accomplish.

I,m an 11 handicap on a very narrow demanding golf course. Again I said it is subjective, I feel the prov1x  is longer off the driver, is superior around the green and with short irons. Enabling me to play my game.   I feel the NXT tour is longer off the long and mid irons, but not as responsive as I want around the green.

If the cost is not an issue I would play the PRO V1X.

I still think you should ask yourself what are you looking for?  What are your skills?  What do you want out of your golf ball?

Dan,

I posted a similar thread a few months ago. I am a 9 handicap and totally agree with Vincent's response. I made the switch to the ProV1x. A member of Titleist posted on my thread that off the tee both balls would be within 4 yards of each other. I like the softness of the ProV1x as well as the spin I can generate in and around the greens.

I have not tried out the 2011 ProV1x but I love the 2009-2010 version and play it exclusively.