Here is a scan of some of mine.
Here is a scan taken from a post of one of Al's cards from a previous thread.
Assuming your source is correct, and only one type of card stock was used, it would make make logical sense to assume the white card stock is counterfeit since the vanilla bean/tan card stock is used on the complete stat backs and the red ink only stat backs. I will pull the white backs out and look at them under my 10x magnifier to see if I notice any irregularities from the others.