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The influence of the technical directors is indisputable, but there is almost no difference in the squad between the two teams. Because both teams consist of very high-quality players. I especially like Bayern Munich's squad more. Barcelona has very high-quality players, and it will be an extra meaningful match, especially for Robert Lewandowski. Because he will be playing against his former team Bayern Munich, where he introduced himself to the world. He will probably want to score goals to prove himself, so I think it will be a good fight.
There is a difference in squad depth between Bayern Munich and Barcelona - the two teams are not the same. Barcelona have more young players in their first team - but Bayern Munich have a lot of experienced players. But I admit one thing - both teams have good quality in their squads and both are league leaders in their respective domestic leagues.
Barcelona with their new coach really rely on the strength of their young players. Lamine Yamal is the best young player in their squad at the moment - while some of the other young players are not bad either. Some experienced players like Lewandowski, Raphinha and De Jong are expected to provide balance - but between the two teams there is a difference in mentality.