BV, yes, there's a difference. RD's are A. libiatus, and Midas are A. citrinellum. Very, very close species though, with only a few minor physical differences really. To be honest though, most Midas or RD's purchased in petstores these days, are actually a cross of the two. So in theory, all my guys likely have a bit of both in them. I just call them according to which characteristics they show. Karma looks very much like a Midas, even though he may have some RD in him too, so I consider him a Midas. Draco and Kujo are a bit too young to tell for sure, but they both appear to show very strong Midas traits as well - but I'll have to see how they mature.
Fuzz, I'm considering trying to pair Draco and Kujo up, but I need to get a bigger tank before I can do that...and who knows how long it will be before I can accomplish that. So I'll have to see how things go. For now, they'll all remain in individual tanks.
Thanks Helena