No, the brains of men and women are not entirely different. It is not possible to see just from looking at a brain whether it belongs to a man or a woman. In essence, the male and female brains are pretty much the same. There are some minor differences though. On average, men's brains tend to be slightly larger and women’s brains have a thicker cortex. Overall though, the male and female brains function in the exact same way. Of course, scientists are debating this one as well.