I have two WMB and one Animal. The one WMB and Animal are drilled up the same, Pin under my ring finger with the CG and MB kicked out between my thumb and VAL. I would say that the Animal is a true oil ball. I can get my WMB to work on oily lanes but the Animal is better on heavier oil patterns, its earlier and I think the coverstock is better suited for oily lanes.
Hope this helps a little