Here.. I think this explains the Albino thing better
albino (āl-bī'nō) Pronunciation Key
An organism lacking normal pigmentation or coloration. Animals that are albinos lack pigmentation due to a congenital absence of melanin. In humans and other mammals, albinos have white hair, pale skin, and usually pinkish eyes. Plants that are albinos lack normal amounts of chlorophyll or other pigments.
I'm still fairly new to genetics so I can't really explain how they are different from bettas who are white in color and those who are ablinos. They are most easily set apart from each other by the fact that Albinos have red eyes. Maybe someone else with better genetics knowledge will know.
Here is a great article by Bettysplendens on purples and what constitutes a "real" purple. I think a fish like the one in the second picture of the article would fetch high dollar (well over $100) if put on aquabid. http://www.bettysplendens.com/articl...?articleid=757