I think Manchester United are experiencing the Ten Hag effect, I will clearly agree that Erik Ten Hag has impacted positively to the team with his disciplinary measures, his tactics and style of play is now proving productive which we can obviously see on the team's outstanding performance lately, the most surprising part of it for me is how well he has transformed Marcus Rashford to be more lethal in front of goal.
Xavi has had an equally positive impact on Barcelona, so it is very difficult for me to understand which team has benefited more from the change of coach. Rashford had already been showing great performance before ten Hag but now he got more playing time and more space due to the absence of Ronaldo and this was his chance and he took it.
To some extent, these are equal teams, perhaps Barcelona has the best defense, but in general they are very equal teams and I probably still cannot give an advantage to any of them.