@The Thespian:
So...what?
Should we now start calling RSII a copy of RTR because they're both about Rome? Should we call Rome Medieval a ChivTW rip-off because they are both set in the Medieval era while Chivalry was first? As long as Heg doesn't have a monopoly on "Classical Greece" mods, everyone is free to create his own mod in the setting he/she likes.