I've already answered the question for myself. The girls are the same mesh (the heads, at least), but if you apply a Vicky head morph the head (unsurprisingly) reverts to Vicky size and shape, without taking the eyeballs along for the ride and squshing the neck down. The CR2s are technically NOT based on V2 because the kid morphs aren't the same as the V2 morphs. Same names, same functions, but if you tried to pilfer the morphs for use with Vicky you'd get a little kid head and eyeballs where the cheeks should be, probably. I'd also guess the morphs were hand-tuned for the kids, not just scaled from the larger ones. In any case, you can't easily extract V2 content from the kids as far as I can tell. So, while they sport the same innovations that V2 does, and the base Vicky mesh, they're still original characters the way Vicky1 was. Until we hear otherwise from DAZ (and they weren't tightlipped about this when they released V2), I think these characters are safe to distribute.