Did some testing last night on the course (Cinnabar Hills, San Jose, CA) with the Tour X versus ProV1x. Had the best driver results in distance and accuracy in a long time - off all clubs the ball did well into the wind and down-wind. Durability was really, really good - only blemish was me hitting a cart path on a drive, but the ball still performed over the remaining 3 holes of the round. Spin and feel off the wedges and putter were on par with the ProV1x for me and I didn't notice any significant difference. I'll be moving over to the Tour X and looking forward to the rest of the season!