Both are white bud teas from Fujian in the same area. If there is a difference it aint worth splitting except by price. The dry DP are smaller, PE bigger consequently the infused DP are shorter bud, PE longer. I find the DP have a sweet aromatic note. According to the Internet the DP are the early spring first bud and the PE first bud but later. When I talk about white tea these two are my standards along with YinZhen. If you add a scent you subtract the essential ephemeral essence of the taste. The Fujian spring bud comes in many more shapes like sword and rings besides pearls, eyes and needles.
Jim