Intelligence refers to the external temperament that is naturally produced by the inner culture. To put it bluntly, it is the temperament that makes people feel that this person has culture and connotation at a glance. It has nothing to do with rationality and scheming.
The word intellectual is often used in the description of female characters, and it is used on positive female characters. From my personal understanding, the so-called intelligence seems to refer to the so-called rationality as opposed to sensibility, and the female characters praised as intellectual are nothing more than women who are smart, sharp, and accurate, a bit like modern professional women or female staff.
Being willful means insisting on one's own path regardless of what others think. To put it bluntly, it is just a stubborn thing. But being willful is not a good thing, because being willful will complicate many things, but People also need to be moderately willful, which will make life rich and colorful. No one is perfect? ??As long as it is reasonable and moderate.
The difference between the two is that one is feeling and the other is character expression.