Bread yeast is selected to leaven (raise wheat-based dough), produce a lot of CO2 in a life span of 4-6 hours, and die off. Wine yeast is created in a lab and selected for its ability to produce high alcohol in adverse conditions (like no oxygen, low pH/acidic environment, and high sugar concentration). Yes, you can ferment ethanol with bread yeast, but to make quality wine you would need a special wine yeast.
Wine yeast will produce high ethanol (ferment dry without residual sugar or sweetness), does not produce off-flavors, and bring out the best color and aromas from your grapes and fruits. For more details, please refer to this tutorial