depends on the drilling.  These balls are very, very similar.  The BP goes a little longer and snaps harder.  However the WCPP is more consistent and predictable.  These balls are very interchangeable.  I play the exact same line with them, and grab the other if carry isn't there.  Last week shot a 202 with the BP, switch to the WCPP, 276.  This week, 196 with the WCPP switch to the BP 279.

If your looking for backend and length, I would lean towards the BP, however, if you bowl on tougher conditions, the predictability of the WCPP would be my choice.