"Reflex neurovascular dystrophy (RND) is a painful condition that leads to severe pain in the joints and muscles in children. The pain may be described as sharp, burning, achy, crampy, a pounding hammer, or cutting like a knife. The pain is caused by a nerve sensitivity whereby the nerves in the body send pain signals to the brain inappropriately. RND affects girls more than boys (80 percent girls)."

(Childrens hospital of Pittsburgh)

Symptoms are alot alike, with some differences. Also let me point out one big factor, with RND pain it is in the joints and muscles. Whereby, RSD can affect anything relating to the sympathic nerve. RSD runs along a nerve root. So NO they are not the same thing.