Is there a chart that outlines the differences between the FinCEN 314(a)lists and the OFAC SDN list?

That's sort of like asking for a chart the outlines the differences between chalk and cheese.

Golfer9, the 314(a) list is a one-time search requirement - i.e., you complete your search of your records and you're finished with that list. You don't search that list for subsequent customers or transactions. The OFAC list must be searched in connection with any or all customers, transactions, etc., as deemed necessary based on your institution's OFAC risk assessment.

Hope that helps.

...a "hit" on a 314(a) list requires you to simply notify FinCEN and a "hit" on OFAC will require action that is based on the reason the customer is on the list, generally you will block the transaction.

Either type of hit should prompt some enhanced due diligence; i.e. a review of customer activity.