Korea isn't even a real country, they're a colony without independent economic, foreign or defence policy.Koreans are arrogant, but they are going to copy China's plans of developing their economy.
Infact Korea has never not been a vassal or colony in the entirity of their history, it's so ingrained in their mentality they're the only country in history that begged to be colonized by someone new in the brief few month after WW2 when they weren't a vassal.
You have to become a real country first before you can even get to all the other reason they're not even remotely comparable to China.