Coffee has more caffeine than tea, ounce per ounce.
The actual amount can vary depending on the brand and type of product, preparation method, brewing time and portion size. So your choice of brand, the size of your mug and the amount of refills will affect the amount of caffeine you drink. Tea has antioxidant properties that have not been attributed to coffee. Antioxidants reduce the damaging effect of free radicals in the body that affect aging cells. Heart disease, cancer and other diseases are, in part, affected by free radicals.