Would you recognize those beauties as Dyckia reitzii rubra?
The one on the right is one wonderful reitzii rubra, the very true one and in my opinion one of the most spectacular Dyckia. Here it is pale for I keep it shadowed in order to make it recover.
The one to the left is also a reizii but it is what I can say just darker than the type one normal looking reitzii.
They both live this close in nature.
The third and smaller one is a seedling.