I was looking at it and compared it to the 2 options at American Brewmaster, and I think the Dark Wheat is their normal malted wheat, and white wheat is what it is.
I tend to use more malted wheat than white wheat, the flavor is more apparent. but white is fine too, i just don't like $5+ for 3# of it at AB.
I can't see the spreadsheet or catalog here at work so i can't confirm until i get home tonight.
Here is the description from CM and BZ:
Best Pale Wheat (1.5-2.5°L) Best Dark Wheat (5-8°L) Best Wheat malts are produced from plump, spring German wheat. Best Wheat malts are suitable for all types of wheat beer including traditional Weiss beer and American wheat beer.
CMC White Wheat (1.5-2.5°L) Made with superior grade white wheat for the production of traditional German Wiessbier and American Wheat Beer. This malt can also be used for added head retention and mouth-feel in ay beer.
I guess 5-8 lovibond is really not too dark. I don't do that many wits. I'll split a bag with you.