The Purle Sparkle Predator was indeed a special edition made for a pro-am.  It is the same product as the Predator Jungle Green.

The Tornado TPS was enhanced aesthetically by adding the teal to make it a two-color ball.  Nothing about the coverstock or core has changed.

We have chosen to eliminate the Cat logo in the Predator and Savage lines.  Feedback from the field was to make our logos smaller.

In the case of both the Stinger Black and the V2 sanded, I am sure what you saw was fazing, or the reaction of reactive urethane with moisture.  Typically, balls made in the colder months or on days where the humidity is high will faze-out, or produce a "smoky" type of look.

Brian Pursel
Product Manager
Ebonite

Fazing will occur anytime a reactive ball is subjected to moisture.  Back in the days of the original Heat, people thought the balls with more fazing were stronger.  This was not the case, but visually there was a difference in the look of the ball as it was revving.

Some reactive formulations faze easier than others.  Our MegaBite Super Tack Plus was one of these.  Placing the ball in a refrigerator (where moisture is present in higher levels) will produce fazing.  Subjecting the ball to indirect heat will tend to subdue the faxing.  When we made the original Turbo X, we didn't think that fazing was preferred.  An additive was put in the coverstock formula to mute this occurrence.

We accept fazing as a mormal occurrence.  Since we make balls year-round, and cannot control the climate, it is one of the variables that is ever-present in the manufacturing process.  We do not downgrade a ball for fazing, unless it is excessive.

Thanks for the question.

Brian Pursel
Product Manager
Ebonite