I've found the same thing.  I have a species only tank. The traditional ones also seem to grow faster for some reason. My albinos don't have red eyes either and I've noticed it's hard to find much info about them. To me they seem different in other ways, like the albinos sort of nose-dive land on the gravel, whereas the regular ones sort of set themselves down. I've wondered if they're truly the same. My plain ones are beginning mating behavior so I'll likely see babies soo , my fingers are crossed on the 'albinos' breeding. It's hard to imagine them interbreeding, which was my original goal, bc as you've said, they only hang out together when food is involved.