There IS a difference between sweet potatoes and yams!

On Friday I got the chance to go downtown St. George's and go to the local market! I was so excited to see everything they had and the people.
I bought what I thought to be sweet potatoes... but once I got them home and cut them open I realized they were white inside... so we googled it and found out that they are actually yams.  They grow yams in South America, the Caribbean, and Africa.  They are white-ish in color, a bit dryer than sweet potatoes, and a lot sweeter!  I microwaved them just like you would a baked potato and we didn't even add brown sugar, just butter, they were that sweet!! and hopefully just as nutritious.... but I wonder if they are because they are white ? they say that the brighter the color the better for you things are.... hmm.