I think these results in the group stage are reason enough for Real Sociedad to assume that they have a good chance to progress to the quarterfinals. I am not saying they are the favorite, but I am saying they have a good chance.
I also think that way. Even though PSG is very strong in Ligue 1, competition in the Champions League is of course at a different level. Their defeat against Newcastle in the group stage slightly shows that their performance in the Champions League is not very good. Currently, Real Sociedad may not be like last season where they were quite strong in La Liga and were in fourth place in the final standings. But there are still those who think Real Sociedad has a better chance than PSG in the round of 16.
For some reason, I also had doubts about PSG this season, they don't seem ready and their strength is only strong in Ligue 1, but not in the UCL league. Even though they are trained by a great coach like Enrique and have star players, they have not been able to show their toughness in the UCL. Just look at PSG qualifying for the round of 16 through luck only with a difference in goal difference with AC Milan.
I think Sociedad will win the match, because Real Sociedad's game is so solid in defense, very good at controlling the ball, and killing counter attacks through player Kubo.