Welcome to the forum, glad you joined us
Kits that come from a dealer seem to better because you get a warranty and if you have any problems the dealer is most likely to give you any assistance you may need.(Some dealers are better then others)
The kits on Ebay that are cheaper you are stuck with what you got. Altough some dealers do sell on Ebay as well.
It seems that all these chinese motors come with the same carb.