Aston Villa has a coach that experience in the European league, Unai Emery has won 4x Europa League titles, so it's no surprise if they've reached this achievement on his stand. Unai has also coached PSG in the past, so he enough understands how that club played and their habit. I think there will be a surprise that Aston Villa will make especially when they are not favored at the moment. We will watch them first on Parc des Princes, might be a bit difficult to Aston Villa to create a winning, but of course we're going to see a struggle in order to prove that Unai is an extraordinary coach.
In quality and experience in Champions League, PSG have more than Aston Villa and I think it will make big difference in quarter final matches between them. Aston Villa are simply enjoying their adventure in Champions League while PSG after many seasons of fighting here are not simply enjoying it, but fighting for another final match. Especially after beating Liverpool in round of 16 very impressively, have very high confidence so that they will bring it to two quarter final matches with Aston Villa.
PSG performances against Liverpool are very surprising but they did it not only in one match but both matches, so I don't think their outstanding perforamances against Liverpool are just temporarily wakeups. They will continue it in quarter final matches with Aston Villa and that means Aston Villa won't have to good chance for winning.