What are you seeing when these two are in close proximity? GGG clearly has the more muscular frame with bigger hands, forearms and neck. Lemieux's weight is in his Lebanese/Armenian hind quarters.
Golovkin is leaner, no doubt. David has a thick upper body, he shouldn't look like shyt at the weigh in... he didn't look bad at the N'Dam weigh in.
Rubio couldn't do that. However, I question accuracy of those weights. Specifically, Golovkin adding weight in the last 23 days. One or both fighters could wear clothes and/or scale may be inaccurate.
Cutting 7 pounds in a week is on the very easy side of the scale when it comes to cutting weight. Most fighters cut 2x that in the final week. Rubio missing weight does not mean it's not easy to cut 7 pounds in a week. I don't think Rubio cared to make the weight
It all depends on what happened in previous weeks. If a fighter had a lot of extra weight and already cut 15 pounds, 7 more is hard. If he just kept his weight for a few previous weeks (like seems to be the case with Golovkin), 7 pounds is nothing.