the way i understand it is; when we discuss superiority there are really two things that need to be discussed. 1.physical sense 2. spiritual sense. IMHO spiritually and in regards to the next world they are both equal, but in this physical world there is no question that men are more dominant, obviously a healthy women doesn't mind not being dominant so there is no problem, but men enjoy it, therefore the need for men to say shelo osani isha.
in comparison in this world the more "choshuv" a person is, the more we need to respect them, even though in the next world you might be better off...