Since Kylian Mbappe joined Real Madrid, the Real Madrid team will perform more strongly, the attacking department has been strengthened considerably. Having lost Cristiano Ronaldo and Karim Benzema for a long time, the team was without a striker until now with Mbappe. But Real Madrid team has performed much better than this season's Borussia Dortmund team. And of course they have won the title so there is a possibility of better performance due to the addition of stickers.
Not that he wasn`t strong before, eh Real Madrid has always been a very strong and difficult team to face
I would say better, since they took him the percentages of success of an attack, that is that it ends with a goal, are much higher and therefore they simply score more goals, which is no small thing but that`s the job of the attacker