Originally Posted by jturkish
Just figured more sugar equates to more calories
I generally attempt to limit sugar intake
I think you're misunderstanding what the sugar is for. You don't eat the sugar that goes into the wine: The yeast eats it, and produces alcohol (+ carbon dioxide). The sugar you put in won't contribute to your sugar intake (unless you drink the must before it's fermented, for some reason).
Now as it happens, alcohol and sugar have very similar calories, so you're right in that "less sugar = less alcohol = fewer calories".
But to make it clear, a 13% wine made from table sugar is no more or no less calorific than a 13% Bordeaux wine made purely from grapes (or any other fruit).
I guess it doesn't make much difference to your diet at the end of the day, I just wanted to explain that a recipe made of purely fruit isn't necessarily better for you.