For white wines, sultanas seem a preferable ingredient for the grape element to white grape juice, but I recently discovered Flame raisins. These are derived from red (not black) seedless grapes and could be employed in making red wine.
As I currently understand it, a dessert grape is a deficient wine grape, low in acid but with enough sugar to make it palatable, preferably seedless, with a thin skin. They are harvested prematurely, so they are firm enough to survive packaging and transportation.
The wine grape is a badass character, full of pips, with a thick skin and left to hang on the vine until the last possible moment to get the highest level of sugar and then has to be processed as soon as possible before the rot sets in, and in some cases after the rot has set in.