The question of "...is what you eat more important than how much?" Went unanswered it appears. Essentially, what if he ate the same calories each day but improv

The question of "...is what you eat more important than how much?" Went unanswered it appears. Essentially, what if he ate the same calories each day but improved the number of calories he burned per pound of body weight? A hypothesis I've seen scattered around the t00b lands is eating sugar effectively lowers that value (I think it's alpha in his analysis). I wonder how much one can change that and how so.