Depends on what we're talking about. I didn't use them in the same way so it's really difficult and probably unfair to draw a comparison.

My pdoc was my medical doctor dealing with the medication management I needed. The one place I felt more comfortable talking to him was at any point where my symptoms were so severe that hospitalization became a consideration. In truth, my pdoc definitely saw me at worse points than my therapist ever did because my pdoc saw me while hospitalized. So, when I was that bad off, I preferred sharing those symptoms with my pdoc because he was very matter-of-fact about them and was my go-to guy to getting past those most difficult of times. He was sort of my short-term crisis management person.

My therapist was, however, the person I spent hours and hours talking to about my history and my present and how they interacted. He and I had constant dialogue and I worked to figure out all those connections and learn how to cope with life now. It was a completely different kind of talking than with my pdoc and was the most important aspect in my long-term improvement.