Although apples and oranges are both fruit trees, their differences are in color, texture, seeds, size, fiber content, and vitamin content. Apples and oranges evolved about 89.2 million years apart. In terms of their color disparities, apples can come in a relatively wide variety of colors, whereas oranges are much more uniform.
The texture of apples and oranges varies in that apples are much more smooth-skinned, whereas oranges have more of a knobby skin. Another difference is that all apples have seeds, while some varieties of oranges actually do not. Apples are typically a little bit larger in both circumference and diameter than oranges, but this can vary by the specific piece of fruit. The average orange still weighs a bit more than the typical apple.
Apples and oranges have a more substantial difference in terms of their fiber content, with apples having about 2 grams more of fiber. Oranges have much more potassium than apples, at 496 milligrams per 8 ounce serving, as well as more Vitamin C and folate.
Apples and oranges actually have many more similarities than people are inclined to believe. They are both about the same in terms of overall sweetness, can both be juiced, and calorically are almost identical.