Tough one. Probably 616 Thor, though, as I've got a feeling that Ultimate Thor is a lot less invulnerable...I'm not sure if it was Loki's tampering or not, but he WAS taken down in Ultimates 2 #5. I prefer Ultimates Thor, though. 616 Thor is just too cheesy for my tastes. I'm glad and all they gave him a send off worthy of a character with his history (in RAGNAROK), but I much prefer the Sentry in his place.
616 would take him. he had a lot more powers. plus he was all around stronger. Thats not to say i dont like ultimate thor. I do. Its just. I mean hes in more or less a prison cell right now. and they could never do that with the 616 version. well. i guess they could, but i dont know. i dont see captain america and gang being able to take 616 thor.
616 cap is much weaker than ultimate cap tho, but I guess your right 616 thor has displayed strength beyond Ult. Thor, Remember Ult. War Thor got tooled by Magneto and Colluses(sp?). Thor struggled with beating electro, a spiderman villian, in Ult. Six
I don't know anything about Ultimate Thor, but I'll vote for him as the 616 Thor is dead and would therefore not put up a very good fight.
No, Ultimate Thor is a psycho who thinks he is a god with some wicked cool science gear. And Ult Thor would win. Why? Because he can teleport. Teleportation is the key. He teleporrted all those soliders out of harm's way in the alien invasion and also sent that wierd "destroy everything" bomb to some strange dimension. Yep, teleporting.
Ah, but that is what Loki told them. So is Thor actually crazy or is it all Loki playing his tricks? Anyway, my vote would be for Ultimate Thor.
In the last most recent issue of the Ultimates, Loki told his team of Super Villians "If they have a god on their side, you might as have one as well" and that what was being more mischievous then world war threee.