Shiraz tends to be a lot heavier, bolder, and stronger, with higher alcohol content. Shiraz can pack a powerful punch. If you want a full-bodied wine, Shiraz is the one for you! Made with black-skinned grapes, Shiraz tends to have flavors of blueberry and blackberry, and a gorgeous purple-red color.
Merlot on the other hand is a lot lighter and tends to be a bit sweeter than a Shiraz. Merlot has fruity notes in the flavor and is medium-bodied. This, therefore, makes it better for beginners, or those wanting a less intense red wine experience.