Except that won't return a list. You need list(set(<list>)). Also using set means you lose list ordering, which isn't the case when using dict (assuming python 3.6 or higher).
That being said, and not that it should ever make a difference, list(set(<list>)) is 2-3 times faster than list(dict.fromkeys(<list>))
That being said, and not that it should ever make a difference, list(set(<list>)) is 2-3 times faster than list(dict.fromkeys(<list>))