Conclusion: I just finished up the three dozen yellow Z Star XV's I purchased in 2012, so I picked up another dozen this year on EBAY. Bit disappointed to find the softer, mellower yellow replaced with the brighter yellow that other companies are putting out, i.e. Titleist, Callaway, Pinnacle, etc. I personally prefer the softer yellow, that is why I gave them a shot in the first place..
Conclusion: Swing for swing, this ball plays nearly identical to Pro-V1x with extra stopping power and 'softness'. While not as soft as or spinning quite as much as the original ProV, it is high quality. The XV has a very distinct feel with full swings. Unlike older Wound Balatas that feel like they become squished right through to the center, the XV has an almost hollow ceramic tone. It's a very crisp feeling shot with a soft point of contact.
Summary: I have been playing the Pro V1x for a couple years and just decided to try out the XV the other day.( used to play the srixon ZUR-S when it first came out) I feel like this has to be the best ball on the market. You can hit the short irons low and the long irons high. The spin is very predictable and its just as long as the pro v1x. I love the feel off the irons and the control around the green. Very durable as well. GIVE IT A TRY!
Summary: I have tested quite a few golf balls this year and have decided this ball is the best for my game. Great combination of distance and feel. Ball does not seem to spin out of control off of the tee. I also love the feel around the greens. Quite frankly, more golf ball than my game deserves. I am looking forward to using it at the Bushwood Open.
Conclusion: I completely agree with your assesment that the Z Star spins a lot on full shots, but much less than ProV1x on half wedges and pitch shots. I found that very strange also. That being said, isn't you chart for "greenside spin" kind of backwards? The ProV1's have more greenside spin than the Z Stars....?
Conclusion: i loved this ball for everything but chipping. I could not get over how far this ball rolled out with brand new vokey wedges. It sucks because they are so durable and the yellow ball is impossible to lose, not to mention that it is very cool to see your ball flight in yellow. I just couldn't deal with green side spin...back to pro v1 practice balls for $29.99. I wish they made them in yellow.
Conclusion: this ball is amazing...it does everything i could possibly want. it has the distance, spin, feel, and durability i want in a ball, and usually then some. it has a super thin cover, which when you think about it, is better because all the technology is inside...a thin cover lets you get at that stuff better. i played a titleist prov1x before this one, and i'll never go back to any other ball. if they put any muscle into advertising, you'd be playing it too!