I just read this and thought some interesting testing:
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What We Saw From Our Testing
The following are some notable observations on a few of the latest golf balls to be added to GolfBallSelector.com:

• The Bridgestone Tour B330-RX is approximately 10% lower in compression points than the Titleist Pro V1, when measured with the ATTI compression meter.
• Robotic putter testing indicates that the Bridgestone Tour B330-RX, Tour B330-S, Nike One Tour and Callaway Tour i have similar “hotness” off the putter to the Titleist Pro V1.
• The Bridgestone Tour B330-RX exhibits similar cover hardness to the Titleist Pro V1.
• The cover hardness of the Srixon Z-Star and Z-Star X are identical
• The Srixon Z-Star is approximately 15% lower in ATTI compression points than the Z-Star X.
• The Bridgestone e7+ and the Srixon Z-Star X have similar compressions but one with a surlyn cover (e7+) and the other urethane (Z-Star X).
• The Bridgestone Tour B330-RX seems aligns better from a compression and cover hardness perspective with the Z-Star than the Z-Star X.

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I'm not sure what to do with that information?