I've been using white Wilson Pro for years. Every once in a while I get the desire to go with black for a slick all black look. Every time I've gone to the black Wilson Pro I'm changing it the next day scrambling for the white. The white seems to have a little more tack, seems to have better feel and feels crisper/thinner. The black seems OK at first gripping, but as you start playing with it, it just seems blocky and almost too cushy. It looks the same, smells the same, but just ain't.
A buddy who borrows overgrips from me all the time, gave me a 3 pack of Wilson Pro Neon Green. It seemed closer to the White but still not as well of a fit to the racquet.
The rational person in me says it has to be in my head, but once I put on a white grip--I feel I hit clearner, it feels cleaner and my grip is in place better more often. On the black I felt my grip was getting to western and I have no idea why.