What is your preferred specialism?
If it is "directing" then you will need to be sure that you will have the opportunity to develop that particular skillset.
If it's documentary you're interested in then Producer/Director is more appropriate. Director is much more a fiction role.
Most Masters courses use team work and so students adopt a particular role on projects (eg director, producer (or prod/dir), editor, cinematographer, location sound recordist) - how is this decided? There might be opportunities to work in smaller groups or even solo but due to resources etc team work is more likely. For your final project, you will you be able to develop your own idea and pull your own crew together from the cohort?
So more than the university, it's the details of the course you need to look at, specifically how production work is organised and roles allocated.