I assume both Pique and Puyol will be back from suspension.
I'm not questioning that Barca will have to be better than they were against Arsenal, as they didn't need to be good to win that.
All I'm saying is that Inter will make Barca work for the win. If both Barca and Inter play to their maximum, Barca win.
Inter, unlike Arsenal, are good enough to take advantage if Barca have an off day.