The tip on the left has a proper nickel radius, the one on the right doesn't, looks just like the one I did by "eye" after using the proper tool and returning the tip to a nickel radius the difference in play was dramatic, I now use a Willard's nickel radius tool about every 6 weeks to verify proper radius, if your shaft radius is 10mm or less the dime is the one to go with but the tip is too round in the picture, I didn't believe it till I tried it myself, I was able to hit the cueball lower with the proper radius, see Dr. Dave's video on this.