FEATURES:
Optimizing the golf ball for different swing speeds isn’t anything new. Bridgestone has been doing it at the Tour level for a few years now. The B330 and B330-S is for guys with Tour level swing speeds, the RX and RXS balls are for guys who don’t quite hit tour level swing speed.
The difference is that Bridgestone has focused their efforts (or at least the marketing of those efforts) around the idea of core compression (slower swing speed guys can’t compress a regular tour ball), whereas Callaway’s new approach is focused on the aerodynamic properties of the ball.