Oranges did not appear in the Western Hemisphere before the arrival of Christopher Columbus. The scent and taste of an orange can differ by the country, state, county, season, and of course type.
Oranges taste differently based on their position on the tree.
Oranges picked high on the tree are usually much sweeter than those picked closer to the ground. Oranges grown on the south side of an orange tree are much sweeter than those grown in any other location. The north side of the tree always produces the least sweet fruit. The color of an orange has nothing to with the flavor of the fruit. Temperature is the deciding factor of a great orange.