if im not mistaken, the females are just quicker and id imagine a bit smarter since they hunt together. but the males' role in their pride is to protect them from outsiders. whats more, male lions will find other prides and, if possible, they will try to kill that pride's male lions.
if they succeed they will kill all the cubs and proceed to re-impregnate the females, thereby taking complete control of the pride. i think that says a lot.