I would think from my experience that WHAT you play doesn't matter so much, but it does help a lot to play the same ball. Consistency in your equipment is the only way to isolate YOUR issues. If you don't know whether the extra roll-out was your ball-striking technique or the ball, it makes improvement harder.
Playing the Bridgestone e6 for an extended period of time has really helped my short-game.
Playing the Bridgestone e6 for an extended period of time has really helped my short-game.