The obvious variations (please excuse anything that I get wrong, I'm a bit out of the loop):
- Anakin - 2 carded versions thus far - no cloak and no dark circles under eyes/ with cloak and dark circles under eyes
- Royal Guards - blue and red
- General Grevious - with cloak/cape and without
- Yoda - spinning action and cannon
Well now, hang on here just a second Thomas. I wouldn't call those variations at all. Those are just multiple versions of the same character is all - with their own specific collection #'s and everything. There's also 3 different versions of Sidious/Palpatine as well, if you wanna get technical.
As for the blue/purple cards, I definitely noticed that as well as I was sifting through things at MM. I've seen color differences like that before though, and I don't think it's an intentional thing at all. More of a subtle, and addidental, altering in the printing process. This is a more of a "production error", and one that I definitely have no interest in pursuing. Granted, I probably will flip through all my figures to try to make sure I have a matching set, with no purples mixed in there, or blues, or whatever it is that's the incorrect color.
As for legitimate "variations", the only two I've heard of so far are the Deluxe Vader/Anakin with the accessories either below, or to the right side of the figure, and the Kenobi/SBD Deluxe figure where the SBD's leg is either attached to the SBD, or detached and sticking out to the side. Those are the only two I plan on going after so far. Nabbed the Vader yesterday, but didnt' know about the SBD one 'til today, so I'll have to see if I can find one of those now as well...
EDIT: Looks like Flint's suggesting one more variation on the SBD with his arms "out". Interesting. I'll have to keep an eye out for that one as well...