Mike said he got them a few years ago, although they would have come in with no varient listed, they will most likely colour differently to the ones that came in recently. I mean who's to say that the importer brought the fish from the same exporter, or the exporter got there fish from the same supplier with the same line every export for the last few years? Some of them could have come from different locations or different fish that colour differently..
It has happened recently with kadango's and lithobates, one lot of kadango's and litho's (although they had no listed variant) were a splitting image of one.. And the later lot seem to have a larger blaze and colour differently, if you were to get a male from the early lot and a female from the later lot although you wouldn't be producing hybrids because they are the same species its not a good practice..
Dont think Mike would be offended he's just to the point.