Being health conscious is important, especially when it comes to a substance you may consume every day like tea. Understanding the nutritional values of green tea is part of understanding these aspects.

Yes, green tea absolutely has more vitamin C than black tea does. In fact, black tea has virtually no vitamin C in a serving. On the other hand, green tea has approximately six milligrams per serving of this vitamin that is quite important for your well being.
According to the Natural Health Zine article on this exact topic, the reason that black tea does not have vitamin C is because of its fermentation process. Pretty much all of the nutrients in black tea are destroyed during this procedure. That does not mean you should never drink black tea again though. While green tea certainly has the nutritional edge, research does not suggest that black tea is "bad" for you.
Green tea is not processed, which allows it to retain so many of its original nutritional values. In addition to vitamin C, green tea also has three milligrams of calcium and two milligrams of magnesium in a standard serving size. Additionally, the article also states that the following substances are present in small amounts of a serving of tea:
When it comes to tea and other stimulating morning (and relaxing night time!) beverages, people want to know what the caffeine content is. Some people believe that green tea does not contain caffeine. Actually, a serving has about 20 milligrams of caffeine. Just for comparison purposes, you should know that a serving of black tea contains 40 milligrams of caffeine and a five ounce cup of coffee contains 80 milligrams.