As a general rule, more calories and carbs will mostly contribute to fat gains, rather than muscle gains. Ideally, you want to get the maximum amount of protein in comparison to carbs and calories.
This is why I like to much the Isolation by N2BM. It is made with whey isolate only, so there is no lactose, and consequently there are less carbs and fats. Hence, it allows to make cleaner gains, since it is a much cleaner protein product.
Always pay attention to the labels - you want to get as much whey isolate as possible, and the least amount of whey concentrate. Obviously, there should be as little artificial sweetners and additives as possible, since you don't really need those, and they will not be beneficial for you.