To be honest, I can’t tell the green one from the blue one unless they’re side by side. And in the right light when you put the faded PB next to regular PB the faded PB one looks like it might be Inverness Green. So you’re probably right.
Speculation only…
First - The “tried and true” 1960’s Tbird bridge had its share of intonation problems (ask Godofthunder, he designed a replacement for it).
Second - Im not convinced that the Gibson design crew even knows that Epiphone exists. They seem to regularly not incorporate Eppi innovation into the Gibby brand.
I have three points, babicz, Hipshot and Eppi two piece bridges. I personally don’t consider the babicz to be a functional improvement over the three point. Both bridges can be dialed in for equally low action and the three point can get there much faster with less work. At least the Hipshot bridge (which I also have) adds string spacing capability that neither the three point or the Bab can do. That said, My favorite Tbird bridge to date is still the Eppi two piece followed by the Gibby three point.