I´ve got quite small collection of Smurfs. But still I´ve found out there is some difference between same figure with different markings (big surprise)

Of course there is obvious variations that have different colors, mold etc.
But then there´s some tiny differences. For example, I have three 20105 Scots that all have white sox but color of their costume and bagpipe has own shade.
Markings are.
Scot #1 W.Berrie Co. Schleich 1978 Peyo Hong Kong
Scot #2 Bully West Germany Peyo
Scot #3 Bully West Germany Peyo (yellow dot)
One with yellow dot is I believe made in Portugal. Right? It´s colors are dull when others have glossy painting.
And difference between Schleich and Bully I know.
But my question is how many variations do you want/have/keep in your collection?