Well it’s not really a fair comparison. Aside from them both being musicals, they don’t really have that much in common. Wicked is more contemporary, less dramatic, appeals to a younger crowd, has a pop superstar in one of the leads, doesn’t already have have a beloved film version to compare it to, has the Oz thing going for it, etc. Plus Wicked probably won’t be out for another 2 years, so the the Covid situation and the moviegoing experience will likely be very different.
On the other hand, I can’t see Wicked getting the kind of critical love West Side is getting. So apples and oranges, really.