In legal|lang=en terms the difference between counselor and advice
is that
counselor is (legal) a counselor, counsellor, counselor-at-law or counsellor-at-law is an attorney while
advice is (legal) counseling to perform a specific illegal act.
As nouns the difference between counselor and advice
is that
counselor is a professional who counsels people, especially on personal problems while
advice is an opinion recommended or offered, as worthy to be followed; counsel.