Tomatillos and tomatoes are different types of fruits that belong to different plant families. Tomatillos are a member of the nightshade family (physalis) and are related to groundcherries and cape gooseberries. They are typically small, round, and green and have a papery husk that surrounds the fruit. They are used in Mexican and Southwestern cuisine, often in salsa and sauces.
Tomatoes, on the other hand, are a member of the Solanaceae family, which includes eggplants, peppers, and potatoes. They come in a variety of colors including red, yellow, and green.
While there are green tomatoes, which are typically unripe tomatoes that are picked before they are fully ripe, and they can be used in dishes such as fried green tomatoes or chutney, but there is no such thing as a green tomatillo tomato, as they are different fruits.