I like the Gold edition, but, for Gotms, I use Classic. Classic has a much more friendly AI! Actually, I use both versions, I start in Classic and when the AI starts getting nasty, I switch to Gold. Mainly because Gold has a few more bells and whistles, for example, the find city menu in Gold has the cities alphabetized. Also, in Gold you can cycle through all your cities from any city screen, but in Classic, that feature is not reliable.
And FW is combination of the two, it has the "kinder, gentler" AI and the extra features from Gold. In gotms, any version but Gold is good to start because Gold precludes "begging" successfully from the AI, and from forming alliances with same.