What is a wine grape?
There are few differences between those grapes destined for eating at the table versus those intended for wine production. Throughout the world wines are made from whatever locally grown varieties and species are at hand.
Similarly, all those same varieties may be consumed fresh. Generally speaking, those that are referred to as eating grapes are seedless (but not necessarily), thin skinned, loose clustered, and attractive visually.
Sweetness/tartness varies by variety and consumer preference. Grapes used for the production of wines tend to be seeded and contain higher sugar levels which are necessary for achieving the appropriate alcohol content of the finished wine.