The last digits in the OEM part numbers indicate either a part update or some type of general revision or part variation. On a part as basic as a center cap It could indicate a new OEM supplier, special color/finish, or hopefully better glue used to hold the crest on.
You may want to check your remaining center caps to make sure the crests aren't loose.
I reattached mine with JB Weld after scoring the backs with a utility knife.
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