Let's do it on an example:
Present perfect:
I have read "Lord of the Rings:
Present perfect continuous:
I have been reading "Lord of the Rings:
in the first case, I have actually finished reading it and I know the ending; in the second case: I am still reading it, and I haven't finished it yet: so I don't know the ending yet.
So, yes, there is a difference both in form and in meaning between the two tenses.
