New coach Hansi Flick v Vincent Kompany will have their own strategy and tactics and it's true that a new coach might change the outcome.
H2H statistics are bad during the meeting with Bayer Munich Barcelona always lost several matches, now a little different maybe in terms of the coach and also some players are better which means the game will be fierce as well as Bayern Munich.
Barcelona - has Lewandowski and Lamile Yamal.
Bayern Munich - has Harry Kane and Musiala.
Some players are no less good to help their attack later.
I see this game may be balanced but my own feeling is that Bayern Munich will win.
Experience definitely has something to do with this, I do not think Kompany is ready to face Barcelona size team just yet. I feel as if Flick has been around these places before and had some big games in his life and he will be more ready.
But this is football, just as Barcelona managed to lose to Monaco which they shouldn't have lost, and just like how Bayern managed to lose to Villa which they shouldn't have, then we can assume either of these teams could win their games as well, there isn't really a way to calculate which team is better based on a single game. Kompany is definitely more inexperienced, we know this as a fact and Flick will definitely use this advantage to do what Kompany doesn't expect them to do.