It's not the best comparison though. Playing against Osasuna and Real Madrid are completely different things.
I didn't like how Barca played today. They should've been more productive. Lewa doesn't look like he's concentrated in the games this season. The red card and penalty saved them. It could've been unnecessary two points loss. Xavi should use international break to fix problems.
I think the Barcelona problem is creativity related; and with recent injuries to talisman; it is becoming difficult for Xavi guys to create more chances for Lewandoski. With Cancelo at the helm of affairs'; their performances will only improve. I won't blame Lewandoski solely because he isn't getting any creativity or chances until Cancelo first cross today. It will definitely get better for Barcelona.