The 2009 model spins less and does not have a side stamp and also i think plays better in the wind that the 2010 model

From my perspective the new cover is much more durable then the old cover and can withstand the wear and tear of a wedge. In the past a wedge or short iron shot might have made the ball look like it hit a cart path-not any more. Love what they've done!

Honestly I've been playing titelist golf balls for 15 years and I'm totally disapppionted with the new pro xthe cover is terrable I need to use at least 2 to 3 balls a round because the cover just shreds of the ball.Not that I'm a pro but I'm a solid 6 hanicapp before I use to use just the regular prov1 and could use the same ball for 2 rounds if needed.