Before using the ZJ ZLC, I used the Mizutani Jun ZLC. Using the MJ ZLC, it felt grippy. However, until the plastic ball was stiffer, the MJ ZLC was easier to make a spin, but not as high. After replacing the ZJ ZLC, the very hard, stiffer base can make the highest spin balls! The highest spin of the top spin balls with the ZJ ZLC! Sure, the MJ ZLC makes faster balls and discs, but more spin and spin from the ZJ ZLC! Probably the thinner 5.5mm thick base of the ZJ ZLC-it balances spin and speed!