I don't think they're different that much except the ones with the word "naval" which basically makes them make more ships. I've read somewhere around here that people mod the unit_prod/building_prod files to make the AI's build better. There's a column in the unit_prod11.txt where you can set units' priority or whatever. Of course units are tied to buildings so you probably have to mod the building_prod13.txt as well.

I'm no pro to assist you any further lol.