I just bought A damaged box of Zig Zag Blue at a discount, just to try them out. I thought they looked familiar. Except for the logo, they look identical to the Gambler Gold. So I looked at the the maker list in this section. Both are made by Altese in Austria. I tried Largo Mild in both, no noticable difference in them.
They only differences I can come up with are these: 1. a difference box. 2. the Golds are a buck cheaper than the Blue at both Rollyourown and my local tobacco shop.