The difference between these two liquid chalk products comes down to one thing: Upsalite. This patented high-performance material is an advanced form of magnesium of carbonate. According to Black Diamond, it absorbs 10x the moisture compared to regular chalk. In the case of Black Gold, the company alleges that it absorbs twice more moisture than White Gold. While climbers with extra sweaty hands might benefit from the additional grip, the consensus tends to be that it doesn't justify the extra cost. Also, some climbers note that it can dry hands to the point of discomfort. Steer clear if you have naturally dry hands!