>>55054970>gen 4 sold 17.5 million>gen 5 sold 15.5 millionThe biggest factor between their difference is that DiaPer launched early in the ds's life, and were carried pretty hard by it, while gen 5 sold much faster at first, but released in the twilight of the ds's life, to the point that outside of japan, bw1 launched the same month as the 3ds.
