Not to mention how they are formed from the reproductive structures of their respective parent plants and their purpose in the life cycle of plants. Both contain or are designed to contain seeds. Both have an amount of fruit sugar in them. Both are propagated in orchards by grafting. I guess oranges have an advantage as they are also the name of a color.

Comparing apples to orangutans could work.

Or maybe iPhone apps to oranges.

This article is bunk. A comparison is meant to highlight similarities between two things; this article does exactly that.