Yeah as we know against PSG Real Madrid's defense made a lot of mistakes that led to goals and this was done several times --- with a great performance from PSG to bulldoze Real Madrid mercilessly.
I'm not sure how Chelsea will do against PSG in the final, but it's likely that Chelsea will have a better match than Real Madrid, it's just that in the final many are favoring PSG as the winner.
I don't think Chelsea's performance will be much different from Real Madrid's. Chelsea's defense still has many gaps, and their attack is clearly not superior to Real Madrid's. So, with that in mind, I don't think Chelsea's fate will be much different from Real Madrid's. However, finals are always a mystery, and both Chelsea and PSG will certainly give their best. Therefore, with that in mind, I think this match will be more intense than Real Madrid vs. PSG. However, I remain very optimistic that PSG will win the final. We're talking facts, and all the facts point to PSG being superior to Chelsea. This is undeniable, because football is all about player chemistry, strategy, and technique. If all three are good, a team is bound to be great. And PSG currently has all of that, so Chelsea will certainly have a hard time containing them. Therefore, it's not surprising that many people are currently predicting a PSG victory.