I headcanon that while Miles can use his camouflage (invisibility) and venom (shock)
Peter has venom (paralysis/numbing) and natural webs. He doesn't use these because he has the mask on, so he can't bite anyone (also he sorta doesn't want to paralyse anyone in case he accidentally kills someone by stopping their organs), and since he doesn't take good care of himself his webs aren't good enough to use.
So in short, Peter sorta looks more spidery because mmmm spider.
(I am aware that this is basically own Peter at this point but shhhhhh)











