What pressure??? Valdes was very vocal about that his whole career. It's easy to find interview in which he talks about that. It was one of his reasons to leave too, he said he couldn't take it anymore.
VV spent almost a decade without really complaining about pressure,was one of the most prominent guys in dressing room and considered future captain
Somewhere near 2012 or 2013 something has changed with him. It is when suddenly he talked about pressure
seriously and went philosophical with his interviews. Many of them was really weird. Something happened to that guy and it is probably not football related.
I don't really think that GK in Barca is really that different in any big clubs. Manu GKs for example are killed way more with performances that Camp Nou and media in Barcelona won't even talk about. Bravo didn't look to feel the pressure here as he does in Man City.