I did my MA at Central Saint Martins, and the course offers only what you can bring to it. I felt like I was "working with witnesses" in that the instructors were there to challenge my research and the decisions I made, giving me a way of thinking through design rather than a road map to follow. You're given autonomy, but not much by way of direction. At the time I found these methods frustrating, but looking back it gave me the tools to develop my own career independently.

Granted, undergraduate will be more structured. I know some of their instructors and they vary between great and mediocre. As far as graduation goes, the CSM or RCA label holds a lot of weight with journalists and potential collaborators, if you can get in. I still find it helps open doors.