This is what I've read.
This unique hosta exhibits incredibly variegated, shiny foliage. The bright yellow leaves of good substance have dark green margins that jet into the center, and the center brightens to creamy white in summer. It forms a medium sized mound of attractive foliage in the landscape.
I read where some other hostas change leaf color from a yellow to white in summer. Thought it would be neat to have even more variety of color on the leaves. I figure I was getting more bang for my buck.
I saw the white leaves and figured they were the oldest leaves and we are into summer now. The yellow were new / young leaves that would not have changed color yet and maybe won't before the seasons over.
I do prefer the white, (my wife probably would prefer the yellow. She's not that much into plants anyway. She just likes flowers.) I just don't have to have it white all the time. Hopefully where I will place this, the leaves will get white like some are now. I think it would be neat towards the end of the year it would have white old leaves and yellow new leaves on it, as it's showing now.