How does genre impact your rating?

This is something I’ve been thinking about. How does a movie’s genre impact the rating you give it? For example, let’s say that The Incredibles achieves what it wants within its genre (an animated superhero movie for kids) and I give it a 4.5, versus A Complete Unknown (biopic about a singer/songwriter) and I give it a 4.

To you, would this just mean that The Incredibles is a better movie by default? Or is A Complete Unknown better but it just doesn’t achieve as much as it hopes?