Final update: so tried them both with GX centers in back, and now both have a stomp pad and finally got to try them more-or-less side by side with the same equipment and under the same conditions.
They are very much the same except for two things, the white one being thinner is easier to duckdive but the green one being thicker is easier to paddle and get into waves.
Since the surf and perform about the same I think I will have to sell the white one, I was leaning on keeping the green one anyway because, well, it's much preetier, for sure I don't need two boards that perform the same. Plus, if I need to duckdive I probably should be using a shortboard anyway and save the fish for another day.