In terms of quality, LeLe is the worst because alot of the time the printing is off, they use stupid ultrabuild-type helmets instead of hair and not enough plastic, DeCool is occasionally off with printing and have slightly sharper torso edges, but are by far the most like lego, and Sheng Yuan is very rarely off, but the minifigures have odd shaped legs and shoulders.
PS. They are actually from Hong Kong