AMCO pictured. The 3 Maudiae, AMCO, Bankhaus and Charlotte are legacy plants that are 100 years old. We have been lucky to have and propagate those 3 varieties. They have sllight difference between the 3 cultivars, but are clearly sister plants. 
Maudiae 'Bankhaus' in Europe is a giant diploid type of Maudiae. The The Queen/Bankhaus US is definitely a different polyploid. Maudiae 'Magnificum' is a much smaller albino Maudiae, that readily clumps, and is closer to Holdenii 'Sander', another much smaller albino Maudiae types. They were all overall famous ancestors of many albino Maudiae from today. 2-3+ growths