oiled is the most transparent. The more transparent a rice is, the more appropriate is for soups, as it absorbs the ingredients of the broth and makes the mixture homogenous. Also, the more transparent it is, the more hard it remains and it is the most appropriate for baked meals and salads.
Also, rice is used for the production of beverages. Sake is a known wine, with a quite long history, similar to the long history of rice and it is even now connected with traditions and rituals. In Asia, Arack and Choum Choum are also known. Nowadays, 1\10 of rice production in USA is used for the production of beer <<with lighter color and refreshing flavor>>.
As an old commercial used to say, the earth comes back to rice and this statement is not a hyperboly.