I think it is still too soon to blow the horn on China's model. Yes, China has become successful through authoritarianism, but it has only had 2 successful authoritarian leaders, both of whom were competent and benevolent. History shows that, on longer time scales, it is difficult to continuously install competent and benevolent leaders, and when a leader comes along that is not competent or benevolent, authoritarianism makes it difficult to remove them. This is why the American system is superior: if you have a bad leader, they can only do 4 years of damage and can be removed if they are truly awful. China has no such safety, which makes its system fragile in the long term.