Green tea vs yerba mate? Which is better? Both herbs offer a wide collection of health benefits and compounds that are specific to each — helping to boost the immune system, slow aging, and gently increase metabolism for weight management. Green tea’s most prominent compound is EGCG (epigallocatechin gallate) and mate’s is Chlorogenic Acid and saponins. Read more about these herbs, and how they compare: Green tea vs Yerba Mate.