I just wonder what you'd use to eliminate the spots.
I don't think that genetic engineering is quite so advanced as to be able to remove the spots ! But when plants are meristemmed, it is not unusual to get some variation creeping in , and if one is sufficiently different, then hey presto - that one is kept back to be reproduced again.The orange and yellow forms of Vuyl. Cambria arose that way , for example.
Alternatively if the "normal" ones are seed produced, then again, to get one which is a little different is not unusual.
The smart orchid trader knows that if he is selling the same thing as everybody else, he only stands a random chance of making a sale and is limited as to what he can charge ; if he has something the others haven't got, he is way ahead of the game.
As to the second flower, it is not Dgma. Winter Wonderland, ( I have half a dozen of them - wonderful things ...) although I can see where the idea comes from; it is much nearer an albino form of one of the Odont ( now oncidiuim) species -and the delightful imperfections in the flower certainly suggest a species or a hybrid not far removed from the species ; but the name does not leap readily to mind.