You can't go wrong with either ball, however, I will say this: The WMB is much more versatile in terms of layoutability and conditions playable than the gp2. The gp2 is a flat out oiler, even the ones I've seen drill for length are still complete and utter oilers. The WMB likes to be ROLLED (I.E. straighter lines to the pocket, picks up a heavier roll) whereas the gp2 likes to be TURNED (the people who look real good with this ball are all tweener and above).
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stanski