The sweet taters have more vitamin A and, at least where I live, they’re more expensive. That’s all.
Oh, I forgot. Different colors, too.
AncestralChef has the details.
PS: I know a lot of nutrition bloggers and other health nuts use the nutrient database at NutritionData.com. That’s based version 21 of the U.S. Department of Agriculture’s Nutrient Database. The current version, however, is 25. About two years ago, the focus at NutritionData switched to referral of visitors to Self magazine. For my nutrient analysis, I’ve been using FitDay.com. Or you can go straight to the USDA.