From what I've seen over the years he doesn't play as a winger for them - more like a right sided attacker. He cuts inside and occupies central spaces, shoots more often (well, he just shoots, which he didn't do for us for a few seasons, I think).
Plus the confidence and responsibility, obviously. With us he is a support player - always was and always will be. With his national team he was their superstar for years (there are a few talented players there now, but he still is the brightest one), playing for Manchester United and all. It elevates his game massively