They are scleromystax (sp?) in newer references, might help when trying to buy to look for both genus names. I've read that that genus tends to be a bit more aggressive than corys but I haven't kept them.
I like the scleromystax cats I keep and breed S. Kronei and barbatus beautiful long nose fish. they dont seem to be any different from other cories I have kept and breed. Very calm but diggers like all of them especially with sand.