Let me start off by saying I play to a 3.1 hdcp. After seeing the Maxfli review, I purchased 2 dozen of the Maxfli Tour X. After playing it, as well as the ProV1 and Z-Star, the only difference I could determine, for me, is that the PV1 feels a tiny bit softer and the Z-Star a bit firmer.
The Tour X spin into and around the green is far better than the Z-Star and is very close to the PV1. I also find the Tour X as durable as the PV1, but not as strong as the Z-Star.
I am very surprised with the solid performance of the Tour X. For the foreseeable future it is my new ball.