Mhh.. your choice
Euro:
Pro: -High damage
-Best buffs
-Good party playing
-More style

:D
Cons: -15 sec Pot delay
-Need more SP
-For almost builds you'll need a sub
Chinese:
Pros: -No pot delay
-Usefull buffs
-less SP than europes
Cons: -Bad party playing
-Weaker than euros
There're alot of more points but this are the main points. Decide for yourself.