In the first game PSG was much better, but i dont know where you get the opinion that PSG should have won the second match by 5 goals.
Edit: i just looked up the stats for the second game: 2,8xG to 1,3 for Dortmund. More one sided than i...
I like them both, but they are also frustrating.
Coman is fast as hell and great in 1 vs. 1 but lacks end product, Gnabry is basically all end product with good finishing and good runs but useless otherwise.
Both are also quite injury prone...