Played a round yesterday with ProV1x and Tour Speed. I personally am unable to tell much of a difference in feel or sound. The course I played recently had a tournament and for some reason thought it would be a good idea to double cut and double roll the greens. It hasn't rained in about 10 days. Played in a foursome and no one could control wedges and long distance putts. The ball flights were fairly similiar to my eye. I'll continue testing the two but the Tour Speed is firmly in the running from the two rounds I've played