Oh boy. So now we're talking about what
fictional character is better? I agree with Groun_Mole that it's a
pointless argument since the writers essentially control who wins what
duel.
But if we're going off past data in the animes, I'd honestly say Yugi's
the better duelist. Why? Because he uses a mish-mash deck and still
manages to win. Yusei's deck is
kinda random, but it uses a bit of Machine and Warrior types. But there's obviously some synergy.
And Judai...let's not go there.
But yeah, seriously? Who cares which main character is better. I think
you guys should be more concerned how well they duel with each other
than against, as is the basis for the whole damn movie.