The one major difference, is that the zone classic is asymmetric and the AI is symmetric.....So the drilling differences are obvious there.  But otherwise, the AI has activator Plus, which is slightly stronger than regular.  The AI will "want" to be slightly earlier/smoother than the classic due to core design as well.  The AI *should* be able to handle some more oil in box (rough buff as compared to high gloss, as well) with the stronger cover, but it's not a heavy oiler.

Hope that helps some.  But the main difference in a decision is if you want asymmetric or symmetric.
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- Andy


Brunswick...........'nuff said.

classic = activator w/ asymmetric core
AI = activator + w/ symmetric core
these balls compliment each other well i believe... when the absolute becomes too much and jumpin too early the classic is a great goto ball... gets down the lane further and is smooth... for me my absolutes roll strong in the midline and pop in the back... both balls are must haves :-D
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Big "B" Is Where It's At
Activator , Pk 17 & 18 Best Covers Ever...
Sherman