Originally Posted by BigThor
Now Supes heat vision may be hotter since it is "heat" vision after all, but Thor's lightning has been shown to but MUCH more destructive.
While neither is a nice "literal" interpretation, what makes Thor's lightning do damage is its heat. Thor's lightning can cover much more ground and take out a small city in seconds imo, while Supes heat vision is more direct. Thor's lightning also has a wider variety.