The Spin is a new putter from MVP Disc Sports, who describes the disc as "an understable putter that will debut in the 2016 Circuit Event Series. It has a deep profile the like the Ion and Anode, which makes it great for glide-filled lofty flights. Its controlled understability makes it suitable for both new and advanced players alike.
Electron is MVP's mid-grade, softer plastic. It feels amazing, but it is not made for taking a beating at high velocity. It is primarily formulated for putters.