Although both Sempervivum and Echeveria belong to the same family, there are some notable differences between them. Sempervivum typically forms rosettes of fleshy leaves that grow in a compact, low-growing manner. Echeveria, on the other hand, often has more pronounced leaf shapes, with thick, plump leaves arranged in rosettes that can be more upright. Additionally, Echeveria is native to regions in Mexico and Central America, while Sempervivum is native to Europe and parts of Asia.