In This Day In History video clip - May 1, 1931: Empire State Building dedicated - At the White House in Washington, D.C., President Herbert Hoover pushes a button that turns on the lights of New York City's Empire State Building, officially opening the tallest building erected to that date.
1 Sweet potatoes have a lot of nutrients, which are good for you body, such as vitamin B6, potassium, and iron which your body needs to help you grow strong.  Sweet potatoes are a good source of dietary fiber which helps to promote a healthy digestive tract.
The other difference nutritionally comes with the vitamins and minerals each one provides. Sweet potatoes will give you a lot more Vitamin A through beta carotene and yams will have a lot more potassium. Both are low in protein and fat. Both have good amounts of fiber, but yams have a little more.