cat's behaviour counselor

There is a lot of confusion regarding the role of the cat's behaviour counselor. It's quite understandable given the recent development of this profession and how little we know about it in our country (Italy). Let's try to clear some doubts that often lead to big misunderstandings.

The most common error is to confuse the cat's behaviour counselor with a behaviorist veterinarian. What are the differences between these two professions?