There's some undeniably cheesy lines that permeate the Obi and Anakin duel in episode III.....but you really think there's more emotion in the epiv duel?

I don't know.....I feel it's extremely and (again, in the context of no prequel trilogy) wisely understated. These characters were both fairly mysterious and their histories were spoken of very vaguely. It would have been out of place for an overly dramatic and emotional fight to take place.

To me, the drama and emotion from that scene comes much more from look obi-wan gives luke, who then proceeds to watch his master fall to vader.