That does sound odd but if they are other species, the comparisons to C. comosum may not be valid anyway. If they have different unknown preferences, that could lead to confusion & disappointment. I've never had any other Chlorophytums to compare, except a NOID variegated one a couple decades ago for what seems like a short time, maybe a couple yrs. The fact that it doesn't survive but the plain one does might be a similar anecdote but I don't remember any more details by now, like whether or not I repotted it.
...and with any rare plant, if it's because it's fussy &/or requires specific conditions, it's going to be a bumpy ride for most. I wouldn't take it personally at all! Easy to grow plants are not rare, because they are easy.
Keep us posted & good vibes!
