I do not know that they are "batter" grapes. They use wine grapes for
those, but so they will have a more classical "wine" flavor But since
they are meant to add body and a little wine character to a larger
batch, not necissarily grape flavor, they may be made with grapes that
would not amke a good batch of wine on their own...that is they jsut do
not taste good by themselves. maybe.

Now welches is meant to taste good...but not as wine.