No difference
North is called "tangerine", south is called "orange", "tangerine" is commonly known as "tangerine
"Tangerine" (jú) and "tangerine" (jú) are modern Chinese standardized characters, however, "tangerine" for tangerine for the meaning of a, for the " Tangerine" (橘). In some dialects of Guangdong, the two characters are homophonous, and "tangerine" has also been used as the second simplified character for "orange". In Minnan, tangerine is called mandarin. The dialects of the Southwest Mandarin area call it "mandarin" or "mandarin". Tangerine is commonly known as tangerine.
Expanded Information
Tangerine and tangerine are both broad-skinned citrus in the genus Citrus of the family Rutaceae, with a thick rind and a fleshy flap that consists of juice bubbles and seeds. Li Shizhen in the "Compendium of Materia Medica - Fruit Department" recorded: "Tangerine real small, its petals taste slightly vinegar (that is, acid), its skin is thin and red, taste pungent and bitter; Citrus is greater than orange, its petals taste vinegar, its skin is slightly thick and yellow, leaf pungent and sweet."
Generally speaking, the citrus fruit shape is round, yellow russet, skin tight grain fine not easy to peel, juicy and sweet; orange fruit shape flat round, red or yellow, skin thin and smooth easy to peel, taste slightly sweet and sour. Citrus and orange although there is a difference, but in everyday language is often mixed, such as citrus is also said to be wide orange, mandarin orange is also said mandarin.
Baidu Encyclopedia - Tangerine