Pound for pound comparisons do not involve the two fighters ever getting in a ring together, it does not involve them meeting halfway between their natural weight. It is asking, pound for pound of body weight, who is better. If Floyd were exactly scaled up to 168, or if Roy were exactly scaled down to 147, who would be better. See my post on page 13 of the thread for an example, and let me know what you think. Hope that clarifies it.