Syrups are made from a base of sugar and water. They are then naturally flavored, giving them a consistent sugar and calorie amount. Sauces are more complicated in that they often contain many more ingredients, like milk, chocolate, and even real pumpkin. This means that each of the sauces' nutrition profiles can vary quite dramatically. Always double-check ingredients or ask your barista if you’re vegan, gluten-free, or dairy free.