Is merlot wine considered a low sugar wine?

All wines start out with natural sugars. When they are fermented the sugar turns to alcohol. If you stop the fermentation early you get sweet wines. Most red wines are less then 1% residual sugar and this is below the taste threshold for most people to taste sweet. So the short answer is no Merlot does not have more sugar then regular wine it is a regular wine. What you taste is the fruit as Merlot tends to be more fruit forward then other wines.