PSG evidently disagrees. I can't tell which is better just yet, but I have watched Donnarumma a lot to know how he is not the untouchable goalkeeper people think he is. He is prone to mistakes and unreliable at times. The good thing about him is that when he decides to step up, he can be very good, but he's not consistent with it.
Chevalier is also a very good keeper. I guess you haven't watched him much, that's why you rate him so less.
Two players can be agemates but peak at different times. One playing 10 years before the other doesn't necessarily mean he is better. There are players who are 27, yet a 20-year-old player may be better than them. According to PSG at this point in their career, Chevalier is better than Donnarumma.
Chevalier is also a very good keeper. I guess you haven't watched him much, that's why you rate him so less.
Two players can be agemates but peak at different times. One playing 10 years before the other doesn't necessarily mean he is better. There are players who are 27, yet a 20-year-old player may be better than them. According to PSG at this point in their career, Chevalier is better than Donnarumma.
Two images below to help back up your post. See how he dropped form withing the past two seasons?! I believe that wad the reason Luis Enrique wanted the quick change. The second image also says he's no upgrades to Ederson who's recently left Manchester City. I believe he's nowhere near James Trafford but I'm yet to confirm tue stats.
