This is a different competition and I see that PSG is not too favored even though PSG is much stronger, Real Sociedad has gone through a difficult phase in the group so they can qualify for the next round as group winners. If Luis Enrique doesn't feel worried when facing Real Sociedad then I'm not too optimistic they can advance to the next round. The Champions League is very different from Ligue 1 because even though the quality of the players is below standard, any club must have quite big ambitions.
When a club competes in the Champions League, of course they have huge ambitions to get the best results, especially if the club has difficulty qualifying for the Champions League because of the tight competition in the league. I think the atmosphere in the Champions League will be very different from that in the League. PSG may be too strong in the League but they have to be careful because Real Sociedad is a strong team. As a comparison, if Real Sociedad competed in Ligue 1, maybe they would be able to get a ranking of 1-4 at the end of the season. I don't underestimate Ligue 1 but it seems like that's the reality.