Although they may look similar, there are actually many differences between them, making each set unique for different purposes. Dungeons & Dragons (D&D) was created by Gary Gygax and Dave Arneson. At the same time, Pathfinder RPG was developed by Paizo Publishing's Erik Mona, who acquired the license from Wizards of Coast when it ended its publication in 2007. Although both games use polyhedral game pieces, their dice sets vary on several aspects like material used, several sides, etc., so you might want to check these before making your purchase.