Quote Originally Posted by FactionHeir
Everything is relative.
That's it! If you traded maps and/or explored with spies you can easily determine how useful a special ressource for your chosen capitol/faction is: just select ONE merchant and move your mouse cursor over the ressources. So you can compare the different ressources in the different provinces as the tooltip tells you how much this merchant would earn per turn:
This merchant makes 200 at metal in zagreb region but 300 at the gold mine, 400 for sugar near Aleppo, but only 150 for fish in Tripolis... and so on. Of course, the income you will get depends on the skill of the merchant you finally send to a ressource.