How many calories does a lb of muscle burn compared to a lb of fat? also, how many more calories would a muscular individual burn than a fat one?

Too Many Variables: Yes muscle cells/tissue takes more energy to maintain than fat storage cells, however, powerfully depends on muscle, how used, how often, blood supply & the list goes on. Thus, though some measurements are made in vitro, more difficult/guesses to do in vivo, thus no precise answer, only trends. Calories are measured in a calorimeter, not by eating, processed differently, etc; an inaccurate guide.