Well picked up, these sets are very similar. The difference in the 9 pce set is the thickness of the Picks. They are able to get into narrower keyways and have thicker metal handles which provide great feedback. The intro set is a PickPals exclusive set put together by us and has everything you need to get started at a great price. We offer the intro as a great entry point with the option to expand later. Both the nine pce set and our intro set are top sellers, made in the us by Southord.