This is the first time Chelsea will face a big team in this tournament, and I think that will put a lot of pressure on them, apart from the atmosphere of the final itself. So PSG is clearly better in this regard as they have better morals and mentality than Chelsea. If Chelsea tends to choose to play defensive football, then even though their chances cannot be better than PSG's, but it will not be easy for PSG to find the net.
However, if Chelsea is brave enough to play an open game, then it will make everything easy for PSG to get their win, because even though Chelsea's attack line has improved, but their back line has not, and playing aggressively will make them even more vulnerable.
Facing PSG would be incredibly confusing for any team right now. For example, if Chelsea were to use a defensive strategy, it would only give PSG more opportunities to attack. Everyone knows that PSG's attacking prowess is quite difficult to stop. In fact, a defensive strategy could even make it easier for PSG to win. But if Chelsea were to use an attacking strategy, their defense would be even more vulnerable. And PSG could exploit this.
But I'm sure Enzo Maresca will prepare his team to the best of his ability. There's definitely a way to overcome PSG's game. If Chelsea were to reach the final, everyone would have immense respect for Chelsea. And many would be surprised by the result, although I think it's unlikely.