I'd hazard a guess and say Blue dot = 1.6 & Green dot = JTDMine were both changed under the recall, and have a blue and 2 yellow paint dots on them.
There doesn't seem to be any evidence yet that Fiat have changed the spring design at all - unless they're doing it Rolls Royce style - change the part, say nothing, and pretend you never got it wrong in the the 1st place
There'll be no more of that once you get the MazdaCiao