What about to provide a prompt to the user telling them the difference
For example, when a new user to fedora first invokes git commit
without $EDITOR set, a program named fedora-default-editor comes up
and asks: Which editor do you like?
User can do his or hers choice and the choice will be remembered by
setting $EDITOR in his or hers ~/.bashrc
The fedora-default-editor can be a small script that shows user all
the difference and set $EDITOR for the user.