It’s very difficult to make the sort of comparison you are making because it ignores the key difference between the two societies. That is, one is based in Confucianism, which values social harmony, while the other is based on the the protection of individual liberty.

It’s certainly the case that China has less “social discord” because of censorship. To what degree it would have been self-enforced without that censorship is another question entirely.

Consider Japan. Japan is a de facto totalitarian state with individuals and groups enforcing cultural norms independent of government backing. It has censored media, but not nearly to the extent that China does. It has very little social discord, despite an economy that has been stagnating for more than a generation.