A good hamburger also has a small amount of pork. Also for the pork v beef question; beef is a lot easier to enjoy on it's own with better cuts while pork tends to require more effort to be tasty. I'd say it's more about the cut of meat and what you are doing with it is a better argument than simply saying one is better than the other.
I'll take a brisket over pork roast and pork ribs over beef any day. Pork butt for a nice char siu and filet mignon sous vide to near medium rare then basted in butter and herbs is to die for. So I am going to be the fence sitter that everyone hates and say that each individual cut of either pork or beef are better suited to a specific dish.