The tax rate a region can run is highly variable, based on many factors that, so far as I know, most people have not figured out. To say "I can run 19% here, so you should be able to run 19% there" is simply a fallacious argument, especially if the two regions are on different islands. In addition, the game considers 10% as normal. Your 19% is 9% over, whereas 25% is 15% over. And yes, it can make that much difference.
I'm not saying you can't run 25% in Golden Farrow, but I highly doubt you could do it for very long (more than a week or two) without serious, dedicated effort.
