Several varieties of limes exist, and may be divided into two types: acid and sweet. Acid limes are popular in the U.S.; sweet in India and Latin America. Lime oil, from the rind and pulp, is used in cosmetics as a fragrance and a fixative. It is also (needless to say) used as a flavoring in food and drink.

This fruit was known as Persian Lime when introduced in Australia in 1824. The Tahitian lime is widely cultivated throughout tropical Asia, especially the West Indies, and is possibly a hybrid of C. medica with an unknown species.

And I personallly prefer the lime over the lemon.