I know the initial question was the difference between them and it has been explained early on in this thread.

My concern is the later discussion recommending which to start out with:

Therapy with a Psychologist should be explored first, no matter the kind, BEFORE going to any medication therapy with a Psychiatrist, and then medication therapy should be added.

Without knowing the issues and getting a true diagnosis, unobscured by meds, none of the therapies will be effective. It's easy to take a pill, and can be readily prescribed if needed, but that has to be determined. It is not so easy to undo its effects if was quick to judgement and the wrong choice. A pill also cannot fix everything, there are issues that still usually need to be worked on in therapy even if medication therapy is needed. Is also why it is best to start out with a psychologist, then go to a psychiatrist if medications are needed as well.