The thread about, what to be considered a complete basic set without variation, made me start this thread.
Seems like we all agree that the two different C-3PO and the three R2-D2 figures all are different figures and not just variations, even through the first ones were replaced with the newer ones. They also have different production numbers, which clearly indicates, that they are different figures.
We also agree that Jawa vinyl/cloth cape, Han Solo small/large head and the DT/standard lightsaber figures all are variations and not different figures. I agree on this as they have the same production numbers, the exact same names and the same cardbacks.
What we disagree about is whether blue Snaggletooth is just a variation of the red one or a completely different figures. The huge difference leans toward it's a different figure, but it has the same name (it was just called Snaggletooth on the packages) and as far as I know it also have the same production number, which leans toward variation.
I used to call it a figure of it's own but is no longer so sure, whether it is, or just a very major variation, I mostly lean towards variation. No matter what, I still believes it belongs in a basic set of figures.