Either way, one of them will lose. The second leg decider will be a hard work for both teams to show a fierce competition. Arsenal had some problems in the first leg, maybe they also got pressure when they had to play well and win the match, unfortunately the result was not as expected. PSG played well, and the second leg will be quite difficult for Arsenal too. But they still have a chance if they make a miracle that surprises PSG.
I hope that miracle comes when they needed it the most because the Gunners have come along way for this very campaign and also PSG too but I'd prefer the Gunners to make it to the finals, how many years now that they haven't seen a champions league final, it will be disturbing honestly. But that lack of consistency is the major problem Arsenal are having at the moment, you'd see them getting a perfect display and the next game you begin to wonder if this was the team that made the game of football look easy? Now you feel what I'm saying, last time Madrid was the barrier and they didn't think twice before knocking the Spanish team out and we thought that the momentum would still be their, in their next game they messed up now the same silly mistake wants to repeat itself, to tell you the truth I feel tired and sad for a club that plays good football but could not stay that good for long.
However PSG is also a team that really wants the Champions League trophy. They are currently performing more convincingly than in the qualifying round. Especially now they are ahead, and of course their spirit will continue to increase.
I also actually prefer Arsenal for the final match. But who knows what will happen in the second leg. A surprise could happen, or conversely Arsenal might get even worse.