My expectation is that the outcomes would be similar for the common issues, and would start to deviate as you got into more uncommon problems. A doctor will have a lot more "background knowledge" to be able to consider things that are outside the every day. At least in my mind, it's not unlike someone in software development with a degree in it vs not. For most things, the person without a degree will do a fine job; but for some things, they won't be able to consider many of the possible options/tools, because they just haven't been exposed to them.