Yes. Every person on the face of the planet is unique (except clones, but that's beside the point). However, there are differences between the brains of men and women. Specifically regarding emotions, areas of the frontal cortex (higher cognitive functions) and limbic cortex (emotional response) are bulkier in women's brains than in men's. This isn't true for all people, of course. Some women have brains which are similar to a typical male brain, and those women are often more logical and goal-oriented. And I'm not insinuating that we should base our opinions of individual people on their sex. I'm merely stating that, between the population of men and women, there are significant differences which we must recognize.

But that isn't important... I was really wondering "... why you supposed empaths have so much trouble understanding people who are slightly more or less emotional..."