I don't know how you're figuring it has less sugar. If you mix the powder according to the directions, it still has 13-14gms carbs per 8oz. They both contain dextrose as well. In the bottles it takes the form of glucose syrup, and in the powder it comes from powdered dextrose for obvious reasons. So the only difference is that the powder does not contain fructose. They both contain sucrose as well, aka table sugar.
Rex.