CodyPendant -- would you clarify your selected meaning for "synchronize" please?
Previous responses address a timestamp match, but to me, "synchronize" might more likely mean "contents match in a binary compare" (or, if Linux on one box and Win at the other end of the ftp connection, a rules-based compare, allowing for line_ending differences).
UPDATE:
answered below; appears that there is NO issue re content-matching.