Originally Posted by kedrell
I think his Thorbuster would stand a better chance of success since Thor's power level is for the most part unchanging.
There is a difference in Tony's Asgardian armor and Thor Buster.
Thor Buster is powered by Asgardian energy Thor gave to Tony to replicate for Earth's use.
Asgardian armor is what Tony makes in Asgard using the Dwarve's forges.
Edit: tho in the movieverse I'm not sure what Tony would use for the armor seeing as nothing Asgardian other than the Destroyer has been left behind