Over the last several years green tea is now very popular which is available in nearly all stores as well as cafs. It is also used in all kinds of goods such as shampoo or conditioner, face ointment, candles and lots of other every day items. Oolong tea is created from the same plant, which is called Camellia Sinensis. The real difference is that Oolong is really a semi-fermented brew whereas green tea is unfermented.