I don't think those details are unnecessary, in fact they are VERY necessary to the joke. In version 1 we see Batman is better drawn, with larger muscles and an exaggerated package. He ultimately wins this duel because of the bias behind the person who draws the actual comics I am parodying. In version 2 it is the opposite; Superman is drawn as the grander hero with an equally grand package.
It is the subtle things like this that really take crappy Flash animations to a higher level then the ones made by people with too many fans, taking liberties with jokes made famous by Family Guy and the like.
Never the less, thank you for watching.