In general terms, it doesn't matter if it's red or white, vintage or cxxp, the stronger the alcohol the less carbs as more sugar has been converted to alcohol. Better red wines are often stronger hence work better. This is why whisky, vodka etc has zero carbs - all the sugar has been converted to alcohol. The carbs don't matter that much anyway as the liver can't convert them to blood glucose while it's dealing with alcohol. That's why you get lower BGs after alcohol, and why those using insulin have to be wary of hypos.