The Odyssey has the potential to roll much hareder on the backend. The Special is, from what I've seen, a very even rolling ball. I kind of agree and disagree with what thirtyclean said. On one hand, the Special seems to be more predictable and less jumpy for those playing inside with a great ammount of hand, yet I have always been one to feel as though stuff that is cleaner and more angular is better from inside than even rolling stuff. When you get an even rolling ball, it tends to back up a bit when covering a lot of boards.
My recomendation, is that for those that are playing on more difficult shots, that are looking for a versitile piece, choose the Special. Those that are looking to kick the ten out on a typical house shot, the Odyssey is the better choice. The odyssey is also a strong asym, meaning that one can get a wider variety of reactions out of different layouts.
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