It can be tricky to ID Aeoniums since they look different in summer and winter, shade and sun, and one species can look just like another at a different time of year. For example…
I believe these two are actually the same plant, and some books list them as synonyms. But they look very different! On the other hand, one has been growing in sun and the other in shade. There’s no question that they are correctly labeled based on books and such, but is that enough to know for sure? No!