It actually does have everything to do with lore, Dooku's style completely dominates Obi-Wan's.
I dont think the lightsaber styles even existed in the movies, just an EU product. It was either you were a better lightsaber duelist or werent, which was what i liked about it.
Not in the EU where one guy cant beat someone in particular because of the the lightsaber form/style they are using. A good example is Mace Windu with Vaapad where "apparently" most light-side duelists would beat him but he would completely decimate a sith due to his saber style.
But Lucas stated he is one of the most powerful jedi and able to beat Palpatine without ever bringing up Vaapad. Now that I think of it I dont think he has ever brought up any of the differnet lightsaber forms.