While grape and cherry tomatoes are similar in size and shape, they differ. Grape tomatoes are generally more elongated and oblong in shape, resembling a grape, hence the name. Cherry tomatoes are typically rounder and smaller. Taste-wise, they are quite similar, with both being sweet and flavorful. However, some may find cherry tomatoes slightly sweeter than grape tomatoes. In terms of culinary usage, they are interchangeable in most recipes.