So from doing some research and Instagram browsing, it SEEMS adidas decided to change the outsole on the preorder "GR" pair from white to black at the last minute. This is allegedly to keep it aesthetically in line with the white ESMs. adidas did update their website to reflect this change after the preorder launched. Kind of a bait and switch on their part.
The OTHER "white" UB is part of that collective. The collective pair comes out June 6 and has higher quality materials and a white outsole. It also doesn't seem to be pure white to me, looks more like a tonal grey, but maybe it's just the pics. I'm more drawn to the collective pair, but I have a feeling they'll be more limited and probably in the $220-240 range.
I preordered the "GR" pair on adidas yesterday. Would have preferred the white outsole, but we'll see how they look in person.