The fact that they were able to put him down with a "small nuke" is indicative that Ult. Colossus isn't as tough as the higher ups in the 616. Guys like THor and that Hulk have survived full blown nuclear attacks.
Ult. Ironman is nowhere near as powerful as his counterpart. First of all Ult. Ironman can go about 8hours before his suit runs out of power and then he needs to drain a whole city grid to recahrge. Ironman can convert ambient enrgy to keep going indefinetly. 616 Ironman's weapons can level cities, Ult. doesn't even really chew up the landscape. Ult. can fly a few thousand mph 616 can hit escape velocity. A few hits from Ult. Hulk and Ult. Ironman's suit begins to crumble. 616 has already gone tot-toe with several times and his armor has held up.
Ult. Thor is no where near as powerful as 616. First of all if you take Ult.s belt off he becomes powerless. Second Black widow was able to inflict some pretty serious damage on Ult. Thor with the rather conventional weapons on her armor. Where as 616 was able to walk through Superman's Heat Vision. Ult. Thor has yet to do one great feat of strength that would warrent his beign compared to his demi-god like original.
The jury is still out on Ult. Hulk. But the fact that he felt a hit from Captain America, combined witht he fact that hsi healing factor is seemingly gone tells me that he isn't as powerful.
Earth 616 Thor destroyed a planet, fought Hades in hades realm, fought ulik who's strength was increase a 1000 fold, fought Ares who's strength was triple, Hit a super strong alien with so much physically force knock him out earth's orbit and the solar system. Thor alone would kill ultimate universe in a half-day.
Marvel universe 616 is the original, while ultimate try to make the characters more realistic. But earth 616 universe over all is to powerful for the ultimate universe plain and simple. Earth 616 Thor, Hulk, Iron Man will eat the ultimate universe alive, Earth 616 feats are off the charts sersi alone will kick the shit out of ultimate universe.
Because juggernaut has the powers of a sky-father or elder god, even though thor is hybrid god he couldn't hurt juggernaut at all. Only beings that hurt juggernaut was Onslaught, Nimrod, I might be forgetting some others.
In the Juggernaut respect thread there was a string of scans showing Thor being easily beaten by Juggernaut. He was about to be killed when other Gods came, and transported him away.
How did Nimrod hurt Juggernaut? Nimrod is weak enouph for Colossus to beat him in a fight.
Firts of all Thor did WAAAAAAAAAYYYYY better than colossu could ever hoep to do. Why because he was able to use his hammer to nllify some of the enchantments that made Juggernaut invulnerable therefore allowing the two of them to slug it out more evenly. During ths 60 second window THor was actally doing some good damage to Cain. Unforutnaetly the time limit on hte Hammer ran up and Juggernaut got his full powerback and was instantly healed of all damage.
The most colosuss has done to Juggernaut is amuse him for a few seconds.
As for where Juggernaut destroys Thor it happens pretty much every time they meet the whole 8th day thing was really no different than how it noramlly goes down.
THor and Juggernaut have fought about three times. The one where he managed to negate is the best that he has managed to acheive. The one they have is the third time they ran itnot each other when Juggernaut heard the Exemplars call. While it was the 8th day Juggs it really doesn't look much different than any other fight they have had.