I think psychotherapy is a method, basically they sit there sileowhile the client tries to figure everything out.
Counselling is more general, some counsellors woffle on, some tilt their heads to the side and look concerned, others offer advice. It's a bit random.
Clinical psychologists have a bit more of a clue, psychiatrists have done shit loads of exams and can write prescriptions and charge 20x as much as any other mind dr