Kaktus said:In general, can I assume that aeonium will easily grow new pups/branches into clusters, compare with echeverias?
Yes. There are two solitary Aeonium species, at least as the genus was defined at the beginning of the 21st century, each of which (perhaps unsurprisingly) has a branching form in cultivation. Those are tabuliforme and nobilis, each with a very distinctive shape. A. nobilis is the giant of the genus, though it does not grow much of a stem.
The rest will branch to a greater or lesser degree. The extremely prolific branchers (eg. A. haworthii, Blushing Beauty) tend to have longer lives in cultivation, and can go on almost indefinitely once they're established in a landscape location. These miniature plants with lots of branches should have a nice long life in containers. The less branchy plants (eg. Cyclops) will put out one or two branches max, so there is always the possibility that you may lose one because it flowers, which motivates a backup plan in place pretty much continuously if you want to be sure you'll have a Cyclops in the garden next year.
Branching is more likely at certain times of year (fall-winter). And for container plants, branching is more likely in larger containers.
In comparison there are actually quite a few solitary Echeverias, or ones that are shy about offsetting until they get old. Some of the most desired are of this type (eg. laui, purpusorum) so they have a decent representation in cultivation.