I don't know the difference between them. Frankly H. fasciata and H. attenuata look the same to me. I doubt very many people could tell them apart either by how they look or what is required to grow them. I'm sure there is something that distinguishes them, but in the nursery trade I expect they are sold under an incorrect name as often as not because they look so similar. Which compounds the problem. I'm supposed to be growing H. fasciata, but I wouldn't be at all surprised if that were wrong. I have read where the nomenclature and taxonomy for this group is even worse than usual - and considering how often names change in the taxonomic world that's an indication of a mess when it comes to specifics on identifying the plant. Haworthia wasn't too hard, but after that..... There are also other Haworthias that resemble those two. That's why I said 'possibly fasciata'. I was trying to get a Haworthia as close to what I could see for growing requirements, not specific identification beyond Haworthia.
