Pratima Baidhya Golfutar, Kathmandu What divides a dry wine from a sweet wine is the level of residual sugar left in the wine after fermentation. While that�s an easy enough gauge to grasp, there�s also the�perception�of a wine�s sweetness or dryness, which throws in a whole lot of other less tangible factors. (acidity, tannins, body, alcohol content, aromatic bouquet, age of wine, etc)