I have the GB2 Gold, its best described as the GB2 but just smoother
I know it sounds dumb, but its exactly that
i usually have a 5" pin on most equipment, 1 of my GB2 has pin in middle finger which is my favorite layout for sport conditions
The GB2 Gold, I went with the pin in the ring finger which a bit strong for me usually
it ended up roughly 45 x 4.25" x 55
And I'm glad I did that because its just super smooth up front and really nice continuous arcing downlane, not snappy what-so-ever
And I do really like the gold in this ball, EBI hasn't used gold for a while that I can remember
If you like the GB2 or the OG gamebreaker, you will love this ball--guaranteed