Here comes the most anticipated segment for comparison of these two characters i.e. Supergirl vs Jean Grey Summers superpowers. Powers and abilities define their strength, both physical and mental. So what will happen if these two super characters engage in a fight? Here you can compare Supergirl vs Jean Grey Summers powers, abilities, weapons and gadgets. So lets check out Supergirl Powers and Jean Grey Summers Powers.Decide who is more powerful!