Not a huge difference, as far as I have learned (AFAIHL):
BB is slightly longer with more backend.
WC is slightly earlier with more of a sense of control.

Both handle very close to the same amount of oil.
Whether you can use either one properly depends on drilling, your "hand" and the actual oil pattern and amount.

If control gives you a better feel, then try the WC.
If you're more comfortable with the "send it and bend it" crowd, then try a BB.

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"None are so blind as those who will not see."

I successfully use the World Class Particle on Brunswick Advil Synthetic Lanes. I am somewhere in the Stroker and Tweener Class, probably closer to Tweener than Stroker.....My PAP is 4 3/4 x 1/2 up and my ball has a 3" Pin and is drilled 3 1/2 x 3 with the top of pin touching the bottom  RF line. (This set-up was recommended by Galen and it works for me) Ball ended up with 5/8 side....1/4 thumb....1/2 bottom.
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Brick

Edited on 9/8/2006 8:08 PM

Thanks for your help.