It certainly is not Andean Fire. But it doesn't look like Elizabeth Castle -- all the ones I've seen have a light edge on top of the pouch. But it is something schlimii, I think.
Wubben and Elsner sell these plants with the same name... Andean Fire. Until any better option, I'll keep this name (and the plant, of course, it's growing at high-speed!) But I'll keep DrOrchid's advice in mind and will not rule out it could be another cross. Thanks to you all!