Sugar apple, cherimoya, and atemoya are all tropical fruits, but they are from different plant species and have distinct characteristics.
Sugar apple, also known as sweetsop, is a round or oval fruit with a scaly green exterior and a sweet, white flesh.
Cherimoya, also known as custard apple, is a heart-shaped fruit with a green or yellow exterior and a creamy, white flesh with black seeds.
Atemoya is a hybrid fruit that is created by crossbreeding a sugar apple and a cherimoya. It has a unique flavor and texture.
In summary, all three fruits are tropical and delicious, but they have different characteristics in terms of shape, color, taste, and texture.