Hello, the nutrition of both is very good, but the effects are different:

Yam has the functions of strengthening the spleen, dehumidifying, replenishing qi, nourishing the lungs, strengthening the kidneys, and replenishing the essence. The effect of yam is that it contains soluble fiber, which can delay the emptying of food in the stomach and control the rise in blood sugar after meals.

Taro is sweet, pungent and flat in nature and enters the intestines and stomach. It has the effects of benefiting the stomach, widening the intestines, laxative and dispersing stagnation, tonifying the liver and kidneys, and replenishing the marrow.

You can put both ingredients in when stewing, add some white fungus, jujube, wolfberry, lotus seeds, etc., and add a small amount of sugar after taking it out of the pot

I hope it will be useful to you and hope you will adopt it~