I will go ahead and say it - this is better than the OOT version.
I disagree. The OOT is perfect. You've got two warriors, far past their primes, who have immense respect for each other's skills with a lightsaber. Each one knows that one false move will prove fatal, and they engage one another with extreme caution. Like two champion boxers, with a long history between them, who face off in the ring--they walk in a circle, sizing each other up, even talking schit to each other, before throwing a few jabs, and then medium punches.
But they never got to the point of swinging haymakers in the duel, as it was cut short by Obi Wan's decision to sacrifice himself for Luke.
And for those of you who also saw the film in that magical summer of '77, you may agree with my childhood understanding of the lightsaber. What a strange weapon this was. I'd never seen anything like it. An energy blade coming out of a sword handle, which was described to us by Obi Wan Kenobi as the weapon of a Jedi Knight--warriors who had and used the Force. Well, I interpreted all that to mean that this was an extremely unwieldy weapon. So unwieldy, that only a Jedi Knight, or someone (like Luke) who was exceptionally strong with the Force, could wield it.
This, of course, was long before the acrobatic lightsaber fighting that the prequels featured. And even before Han sliced open a Tauntaun in ESB.
So, as cool as I think this teaser is, and as much as I'd like to see it when it's finished, the SW77 fight is and always will be perfection.
The Wook