In Ligue1 PSG can still do a lot to get good results with more satisfying results because remembering that other teams are not better than PSG itself. However, in the Champions League, PSG still cannot do much to get satisfactory results because the quality of the teams they face in the Champions League is always different from the teams that PSG often faces in Ligue1. I even still doubt PSG when they visit Real Sociedad in the second leg of the Champions League even though PSG already has two goals in aggregate for the second leg.
PSG has an 11-point advantage over Brest, taking into account the fact that they started not in the best way. It is clear that having such an advantage, they take games in League 1 more calmly, and if there is a draw in some match, this will not affect them in any way.
I didn’t understand what you meant about the return match of PSG in the Champions League, it seems to me that the issue with the winner of this pair has already been resolved, Real Sociedad will not be able to beat PSG by three goals, it is simply impossible. Don't underestimate PSG, it seems to me that even with this squad they are a very dangerous team, and Enrique is still capable of surprising in this playoffs.