Ego Draconis is the original release / start of the story, while Flame of Vengeance is the add-on / end of the story. Start an Ego Draconis character and there is a seamless transition into Flame of Vengeance when you get to that point in the plot. The ability to start a new Flame of Vengeance character (at level 35) was for people who played the original release of Ego Draconis and who wanted to jump to the add-on rather than play from the beginning again with a new character.
BTW, there is a demo for Beyond Divinity (
FilePlanet mirror). Unless you really dislike party based games, most of the time you can have both characters selected and direct them to move and attack as one. The character voices were redone between the release of the demo and the full game.
