The Game Breaker 2 Gold combines one of the most popular Ebonite symmetrical cores, the Enhanced V2 core, along with a pearl version of the GB 10.7 reactive cover. This addition will give you more length than the Game Breaker 2 with a more angular motion off the spot down lane.
Here's what Ebonite has to say about the Game Breaker 2 Gold:
In designing the GB2 Gold, we wanted to create the perfect complement to its predecessor, the GB2. The goal is to create a ball that is cleaner through the front, while maintaining the strong and continuous move at the back end which the Game Breaker line is known for.