In "Beat the Dealer" the Basic Strategy shows splitting a 2-2 or 3-3 against the dealers 2 or 3 card. In "Knock Out BlackJack" it shows hitting the 2-2 or 3-3 against the dealers 2 or 3. I assume this is based upon probabilities but was wondering why the difference in Basic Strategy?
Split (2,2) and (3,3) vs dealer 2 and 3 when double after split is allowed. If DAS is not allowed, then you should hit instead. That's probably the reason for the discrepancy in the two resources. For complete strategies for any set of rules, see the Blackjack Basic Strategy Engine at our sister site BlackjackInfo.com.
