Not necessarily… as has been demonstrated many times, and Xavi himself knows about it. He played for a Pep’s Barça (possibly the best ever) and went out to Mourinho’s Inter playing with 10 men at the Campnou… Same against Chelsea two years later (albeit with tremendous luck).
Two days after Barcelona’s fiasco, Roma went down to 10 men against a Milan side that’s 15 points ahead of them in the league and they kept it together, defended their lead… I’m not convinced that this Paris is that much superior to Barcelona. They are in a transition season, the first one with Enrique and having changed many important players…