I have a Greenii that I got from Perennial Obsession. It is quite different from my Pink Pearl. Other than Oddity those are the only calcareum type semps I have. Well actually Oddity isn't really a calcareum but a natural hybrid of S. archnoideum and S. calcareum, I did have S. calcareum 'Monstrose' but both rosettes bloomed and died.
S. calcareum 'Monstrose'
S. calcareum 'Pink Pearl'
S. calcareum 'Greenii' As you can see my Greenii has struggled. Maybe this year it will take off and be happy.