Ehh two different concepts; philosophy is the pursuit of knowledge, whereas philosophical beliefs are the fruit of philosophers--the after product.  A philosopher doesn't necessarily have to subscribe to any or even most philosophical beliefs; I'm not sure if this is possible without contradicting oneself.  With that said, someone who earned a degree in philosophy is only guaranteed to understand a variety of philosophical beliefs.  A real philosopher is not one who pursues such a degree, but one who asks questions and follows answers to the end.  On the other side of this concept, a philosopher may have knowledge of common philosophical beliefs, but is guaranteed to be equipped with their own interpretations of life, which will happen to coincide with others, as opposed to someone who is largely aware of philosophical concepts but spends more time learning that than asking their own questions.