Superman is far more powerful than Thor
I was just randomly thinking the other day and reached an epiphany, that Superman is far more powerful than Thor and other heralds. Superman has always held back, even on some levels subconsciously...ie even when he is letting loose, he is still on his level holding back.
But a fully enraged Superman would pretty much hit the dial at 11 (as he said). Thing is, Superman has probably never truly reached that status. How would he reach it...perhaps if Lois was raped and killed in front of him...Superman would reach his ultimate power level, his Super Saiyan mode if you will.
I'd like to postulate that Superman normally operates at about under 20% of his power level...whereas Thor and others operate at around 60% or higher, especially since Thor's warrior code makes him relish combat and not have to hold back.
So, the only way to see a fullpowered Superman is if something as traumatic as witnessing Loise rape and death before him and since that hasn't happened, we've never seen what a full-powered unchecked Superman is capable of.
end rant