Diet Coke
Diet Coke does not use a modified form of the Coca-Cola recipe, but instead an entirely different formula. The controversial New Coke, introduced in 1985, used a version of the Diet Coke recipe that contained high fructose corn syrup and had a slightly different balance of ingredients. In 2004, Coca-Cola introduced Coca-Cola C2, which it claims tastes much closer to Coca-Cola but contains half the carbohydrates. In 2005, the company introduced Coca-Cola Zero (replaced by "Coca-Cola Zero Sugar" in 2017), a sugar-free variation of regular Coca-Cola.
Mexican Coke
Results from taste tests have been mixed. In a taste test conducted by a local Westchester, New York magazine, tasters noted that the Mexican Coke had "a more complex flavor with an ineffable spicy and herbal note", and that it contained something "that darkly hinted at root beer or old-fashioned sarsaparilla candies".