I'd like to know, too, since they seem to be very close to each other regarding the surface/coverstock, differing a bit in the core design, but not drastically. O.K., the BZII is asymmetric (I'd like it to be a "normal" ball...), but except from this I do not see much difference?
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DizzyFugu --- Reporting from Germany
"All that we see or seem, is but a dream within a dream..." - Edgar Allen Poe