"A currant is a different variety of a raisin, right?" I would have answered in positive to the question. That is until Ezekiel J. Emanual wrote about them in the Atlantic, "I was told that we ignoramuses ... often confuse currants with Zante grape raisins. However, grapes are fruit that come from vines. Currants are berries that come from shrubs. Currants are only found in the Northern Hemisphere."
More about them at Wikipedia.
More about them at Wikipedia.