The story in Tribunal is more interesting than in Morrowind. It seems like you're in the middle of a war between the two main factions in the city of Mournhold (city of light, city of magic, city of repetative Ordinators). In Morrowind you can choose sides, but that's only for your character's training and has no bearing on the final fight in the game, or none that I can see anyway. Hopefully the choices I'm making in Tribunal will have an effect on the overall outcome of the story. That'd be neat.