Bayern Munich is less effective than Barcelona even though they could have won ball possession. Besides that, Bayern Munich does not have good back line coordination, and they looked very nervous when facing counter attacks from Barcelona. This is clearly a slap for Vincent Kompany. How could it not be, they got a big win in their first match, but after that, they ended up losing in a row, and it was all because their effectiveness was not good.
Meanwhile, Barcelona really deserved the win because they know how to score goals and they are also quite good at defending. A significant motivational booster in the lead up to the El Clasico match because their opponent will certainly be on fire as Real Madrid also got a big win over Borussia Dortmund.
Kompany with a very experienced squad in the team could not do anything against a squad with minimal experience in the Champions League (Barcelona players have many young players), but Barcelona has an experienced coach. This is the difference.
Moreover, Hansi Flick is a former Bayern Munich coach, so he knows Bayern Munich's game very well, so it is not surprising that they won big against Bayern Munich. Barcelona under Flick's guidance this season, they have transformed quickly into a more ferocious team both in the Champions League and in Laliga.
Barcelona's game under Flick has become more direct and simple. They don't always have to dominate the pass and the game. However, their formation is always neatly structured, and Lamine Yamal can quickly adapt to Flick's tactics, this is Flick's greatness.
For Barcelona, this victory will certainly be a good capital to face El Clasico, especially since previously Real Madrid also managed to make a comeback against Dortmund. El clsico this week will be very fierce, both teams have the same opportunities and the same spirit.