If your SZ is OOB finish then the BW is a totally different animal. The SZ will rev up early on anything but heavy oil while the BW has very little midlane read saving most of its energy for a strong snap/arc in the backend. Even with a short pin the BW will go much longer than the SZ. Remember coverstock dictates the majority of a balls reaction. The BW is 4000 grit abralon while the SZ is 800 grit wet/sand.
Personally, I'd look for a BW with a pin of 3" or so, unless the one in question is more towards 2 inches then you can drill it for good length.