No difference, we are not the metabolically efficient, no exercise, i'll repeat that, NO EXERCISE is effective for burning calories. Unfortunately today people lack critical thinking skills and fall, hook, line and sinker for the seductive marketing of business people like Shaun T and the likes. The science however has a way of cutting through the bullshit.
Firstly, its a well established physiological fact that one pound of fat can fuel the body for up to 10-12hrs of continuous steady state activity, which makes aerobic/steady state activity an efficient method for fat loss or calorie burning. Secondly, when you think about it from an evolutionary stand point, if we were really that efficient at burning calories from activity, then i think its fair to say that we would never have made it as a species.
Hope this helps