Premium high-performance balls such as Bridgestone's Tour B330 and Tour B330-S are typically geared for skilled players with fast (105+ mph) swings. The firm's new Tour B330-RX is meant for better players who swing more like most of us (85 to 105 mph). Its core is softest in the center and gets gradually firmer toward the outer edge. (Same applies to the new Tour B330 and Tour B330-S.) The idea is to boost energy transfer to the center, which creates more power. Here's the difference: The RX core is softer overall than its sister products, making it easier to fully compress the ball at "slower" swing speeds. Higher launch and reduced spin off the driver could mean as much as 10 more yards (less with irons) depending on exact launch conditions and angle of impact. B330-RX and B330 have the identical urethane cover so expect them to react similarly on scoring shots (50 yards and in).
The Tour B330 and Tour B330-S (not pictured) are new 4-piece balls that share a dual mantlethe inner mantle (red) is firmer than the outer edge of the core, while the outer mantle (clear) is firmer than the inner mantle. Click on the image above for a better look. Company robot testing indicates that this reduces driver spin by 130 rpm versus current B330 and B330-S.
$43 per dozen