From what I saw, having Carlo Ancelotti as Brazil's coach made a subtle difference in the Brazil vs Paraguay match, but it wasn't like Brazil turned into a brand new team overnight. I mean, they still played pretty attacking and controlled the ball a lot. The cool thing is that Ancelotti seemed to trust his big stars more, letting Vinicius Jr. do his thing, and everything felt just a bit calmer on the field. I've watched Brazil with different coaches, and some would play more defensively or change the lineup a ton, but Ancelotti looked like he actually kept things simple. I did notice the team didn't look as stressed even when Paraguay pressed hard. Maybe that's his experience kicking in. So, it's not like Brazil became wild or totally different, but they just felt a bit steadier and more confident with him in charge, at least from my point of view.