I would say Chinese are well-rounded characters.
Enough dmg with good survivability, better for solo playing.
Europeans may deal a lil bit more damage (wizards, rogues...), but their survivability is somehow less, they got a pot delay for example. However they are great for partying, and if you pick a cleric as subclass you will be fine anyway

There is no such thing as "best race" or "best class" or "best build", a game with any of those would pretty much suck. All games are designed to have different characters for different playing styles. So do some research and pick the one that better fills the way you like to play!!!