The nutritional difference in Green Tea comes from the growing environment and product manufacturing process. The following list contains the Japanese green teas.  Chinese green tea, such as Gun Powder, is not included.  Generally speaking, Sencha, the least processed green tea, has the highest amount of Catechin antioxidants among all the green teas, including Chinese green tea. See the table below for caffeine, Catechin antioxidants, and other nutritions in various types of green teas.

Other nutritions naturally occur in green tea leaf:  Fiber, B-Carotene, Chlorophyll, Flavonoid, L-Theanine, Vitamin U, Saponin, Selenium, Calcium, Fluoride, Iron, Magnesium, Zinc.