The biggest difference is taste. Green kiwi fruit is a winter fruit and has a tart-sweet taste but Golden kiwi fruit is mellow and tropical, a mixture of mango, melon and citrus flavors. People who find Green kiwifruit too tart usually love Gold. As for other differences, the color is Golden, instead of Green, and it is tear-drop shaped, with a smooth skin and a crown on the top. Finally, while you might need to wait a few days for Green to ripen, Golden kiwi fruit is always ready to eat.
