So here are some pictures for comparison. The first shows my A. aromatica (from Montana, Carbon Co., 2960 m), three years old.
The two other photos show again the A. densifolia (possibly) in detail.
I am annoyed that I bought only one of them.
But when I see the provider again on an event, I buy it again. I love these hairy leaves with these folds.
@ Maggi ... thanks for the hint. Water from below ... then it is probably better I use the "pot in pot" method? In the link of Mark stands A. densifolia grows on lime. So I'll be careful to repot it in the spring.