I'm glad you like 2 Alex, I noticed it's shape as well and it has a very warm coloration, 7 is very similar, it seems to be a little more prolific but a little less colorful. The shape is almost on par with Sedum divergens, there are definitely some subtle differentiations in s. album leaf shapes which could be utilized in hybridizing. I've noticed 'Hillebrandtii' has somewhat long tubular leaves, the opposite in a way to the wide leaves of 'Athoum', they are also larger than average though so I crossed those two last year.
-Sol
