At times a woman can be stronger then a man but no always. I think that in a time of was a man is the stronger leader, because he is more aggressive, but at times of peace a woman is better.
A man is better during a time of war because he is more aggressive and men are better warriors because they are trained from a young age. A man will declare war if necessary or if invaders are attacking them, but a woman will try to negotiate a way out and somewhat endanger the people she rules.
But during a time of peace a woman is better because she listens to the people and knows what they want. Woman are also a little more self contiguous and don't seem to get as power hungry as men which means they are less likely to become dictators.
My opinion is that men and women are both fit to rule and both have different strengths.