A reporter has someone to report to,
A witness may or may not.
A journalist will note specifics,
A diarist will note everything, or nothing, depending,
A travel writer is generally on vacation.

A reporter collects and gives “just the facts, mam”.
A Correspondent reports on scene, and
A Correspondent gives background information, and
A Correspondent provides important detail,
to help make sense of an event.

A reporter reports, one way communication.
A correspondent reacts, reflects and allows you to realize what just happened, and maybe even why.

Michael Yon and Michael Totten are co-respondents.
They are more than reporters and less than analysts,
Michael Moore is less than either. A fiction in his own right to left of centered thought. It is not really satire but not really real either.