Honestly I have no idea what these super-mods are either. The only thing I know to differentiate the actual forum mods are Forum Admin and Head Mods. We would be the people who deal with the complaints that come throuh the moderator email.
Disputes between moderators will not be handled by supermods and moderators. They'll go through me, where they would be handled impartially. So I'm not sure what the point of that rank is.