These two will marry soon

I dare here to challenge all gods against all odds.
These two plant are two true species and above all these two are special
individuals within its species.
The Dyckia goehringii above is the stunting sole silver/white.
The Dyckia beateae below is a multicolored individual.
Structurally the plants are almost equal.
Both collected plants.
Let us see.
I always thought these two separated species from Mato Grosso
were...let us say....a bit too much too alike structurally saying....
I am almost sure there two are relatives. But....but.
Here, this marriage will tell us!