PSG is in high confidence after successfully eliminating Liverpool but PSG's consistency this season has not been tested so I think there is still a possibility for Aston Villa to beat PSG in the quarter-finals later.
Overall, I think the strength of Aston Villa and PSG is not much different so it is possible for this match to be fierce.
Regarding concentration and priority, of course all teams will focus on the Champion League match because this competition is the main target of every team, especially PSG who are now only focusing on the UCL competition after they are comfortable enough at the top of the league 1 standings without any pressure to defend the title.
This is the most important thing. After the victory against Liverpool, PSG players are now very confident. Because Liverpool was one of the favorites for this year's Champions League title. PSG players were able to defeat this team. That's why they are now very confident. And this confidence will probably help PSG players perform well against Aston Villa.
Basically, I also think that Aston Villa and PSG are very similar teams. PSG's squad is not very strong. But PSG has an experienced coach like Luis Enrique. And with the help of Enrique, we are seeing great performance from a mediocre team.