It depends.

Of course, I'm going for my MSW so I want to say "MSW all the way!"

But really - it depends on the person and their training.

I've seen really, really, really crappy social workers, and really, really, really crappy psychologists.

But the 2 best people to treat me were from both - in my teens one had their MSW/LCSW and I loved her. The one I see now has her Masters in Psych.

Really depends on the person and chemistry with them.