Sorry, I don't care for either of them. If I have no other choice then sometimes I'll drink them. I'd much rather drink Dr. Pepper than root beer though. I really don't like root beer at all. Now Mr. Pibb I can tolerate. I guess it tastes sweeter to me while Dr. Pepper tastes more medicinee. I try not to drink soda in general though. It's horrible for the body's innards. Diet sodas are actually worse for you than the regulars as well.