I think that's exactly what happened. Both should have been received in the same way, since neither of them proved anything at a team like Barcelona.
Tbf the hype over stegen was not all unjustified. He was one of the protagonists of U17 Euros, and was proclaimed B'Liga's GK beating heavyweights like Neuer at mere 19/20 y.o. So there was a level of excitement over his potential and projection. And that talent is still very evident even if inconsistent. Whilst Bravo's close to a decade tenure in Europe was low key, and very li'l to talk about on an individual level. Hence understandable for not being received in the same way.
He turned out great, but as I said, there was nothing to indicate he would. At that point, his career with chile wasn't as it's now either. His breakthrough came in the 2014 wc. Prior to that, he also used to make blunders with chile. Like the goal Villa scored on him in the 2010 wc. Unzué has a great eye for gks, it's true. But in 13-14, Bravo was still making blunders like the ball he passed to Bale score a goal.
Since you brought up the Villa goal, I recall it was a long range one. He was 27 at the time, more experienced than a 23y.o keeper. If the keeper's off position and the strike is on target, the keeper's gonna come out looking very bad, regardless of other key factors. Apart from the aforementioned incidents, he had poor moments in CA '11 and WC'10 & '14 qualifiers.
Anyway, I hope he plays against Seville, given our recent defensive frailties his experience and calmness will help, whilst MAtS can take a respite.