You'll have to ask the resident historians here, I don't think I'm qualified to answer that. I was personally very impressed by the overwhelming superiority displayed in the bout, though.
EDIT: When you watch the fight, please keep in mind that Rosario was a deadly counterpuncher. He just hits so hard. It is necessary to properly understand what Julio is doing in there. As they say, life is on the edge -- the rest is just filler.