Again, you are reading into the question and adding words the OP did not use. Look at the sentence you quoted. It is "Is one producing more watts than the other?"
Not "Is one [more physiologically efficient such that he is capable of] producing more watts than the other [over a given time]?" Which is an entirely different question you seem to be trying to answer.
I'm not saying you and others are wrong, just that it is literally not the question asked.