Barcelona has difficulties scoring goals, while Real Madrid scored 5 goals against Atletico.
I know that some of the goals scored by Real were a little bit lucky, but that doesn't mean that the attacking players of Real are weak.
Real Madrid is the clear favorite for winning the Supercup of Spain. They will become even stronger, when Mbappe joins the squad in the summer. Barcelona probably needs a new coach and several new players. Xavi can't find a way to make the team score more goals.