The US only has one additional political party beyond China has, and arguably both US parties are simply 'wings' of a larger party owned by the actual ruling class, something neither party wishes to acknowledge. When viewed through this lens the US and China aren't that different politically, and at the same time China is far more meritocratic and promotes leaders on a much more results-oriented basis.
It's like a household where the voters are the kids and the leaders are the parents. In China the parents are happily married and communicate with each other. Kids can't really manipulate the parents, but the parents are reasonable and the household is demonstrably a successful one. In the US the parents are bitterly divorced, bickering, and are easily played against each other by the kids. The household is a disaster, in constant disarray and the kids are going to end up dropping out of high school. However, at the end of the day both of these households are overseen by the same leadership system: the parents.