I agree both Supergirl and Power Girl need to be cute, with one difference, both when lifting or flexing should show bulging muscle, but Supergirl should be somewhere between the fitness and physique competitor with a sizable chest that goes with that style. Now Power Girl needs to be drawn as a competitive bodybuilder again with the chest that goes with the style. They're both one in the same, but from two different Kryptons. BTW Powergirl being a little older need to keep her attitude as well.