I decided to take both my Vons SS398 and mySpiderX to the putting green at lunchtime. I took both through their paces on uphill, downhill, sidehill and relatively flat putts and varied distances. While the results were good with both, I am going to put the mySpiderX into play this weekend. It felt a little smoother on my putting strokes. Less chance of head twist with the thicker grip and mallet shape and weighting. Will report back after this weekend.