A measure of formality, at least in military matters.
For example, in Civ II, you had "nuclear missiles." Whereas, in Call to Power, you had "nukes." In Civ II, you had "armor." In Call to Power, you have a "tank." The difference is slight, but it's one of many little things that made Civ II a more immersive experience.
Civ II also had those historical interludes. St. Augustine, Toynbee, Bede or Gibbon's histories, declaring the happiest, richest, or most powerful civilization.