Psg is the stronger team in this matchup in my opinion. Real Madrid is a very strong team, but if Psg can achieve an advantageous score in the first match, they are a strong team to maintain this advantage in the second match. If Real Madrid leaves with a good score, Psg can play well away. Their staff is really good. Especially on the offensive line, Neymar-Mbappe-Messi is a great trio.
But on the other hand, their current strength is balanced, I think. Their goal ratio is quite balanced in their respective leagues and it shows their strength and productivity is unquestionable.
On the other hand, we also see now the strength of the Madrid Trio, namely Benzema, Vinicius and Asensio, who are indeed quite good. On the other hand, it doesn't mean PSG's strikers are bad but if we look at the current problem, they are still struggling in cohesiveness and some of them are still concerned with their own ego.
When you talk about trio, we have neymar-mbappe-messi trio at PSG. Obviously they didn't play too many minutes together with that three on the pitch, that is the main problem. However, when they did, they were just too good, and that is something important to consider. Yes, they do not have that many minutes together and failed to build a chemistry so far but when they are that talented, you put them against anyone and they are great.
Like that Messi goal against City for example, Mbappe knew how to pass exactly to where because he knows how Messi likes it, and we will see a lot of that if all three will be healthy and ready to play against Real Madrid when the time comes.