For CA Software Asset Manager 4.0.3, I'm using the 4.0.3 catalog dated 9/15/16. When I upgrade to SAM 4.1.2, is it OK to download the 4.1.2 catalog?
Both catalogs are dated the same date.
Yes, it is perfectly fine to download the latest 4.1.2 catalog. Typically, it is not necessary to download every catalog, but it's advisable to have the most current catalog for your release level.