Should I backup or copy [an Access database file]? Access has the option of creating a backup of dbase, but is there any difference between doing this and 'saving database as'?

Thanks for your time and patience for the ignorant.
The "Back Up Database" and "Save Database As" options do the same thing. The only real difference is that "Back Up Database" will provide a default file name like



MyDatabase_2014-11-18.accdb


whereas for "Save Database As" the new name will default to

MyDatabase1.accdb


They both do what is essentially a "Compact and Repair" into a new database file. (The original database file is not compacted, only the resulting copy.)