If you look in RaceConfig.xml, you'll see that all the minor races, save for Akilians, have the same stats (+100 economy, +4 logistics, 0 other abilities). However, the descriptions for the races say that, for example, Jessuins are "hippies at heart", or that the LentzLandians "quickly turn on those who cross them". Do you think there are some hard-coded differences between the minor races?
Also, which file contains the information about the other minor races, the ones which may appear during the game, like the Vegans, Arvanitians, the I-League,etc.? RaceConfig.xml contains info only about the primary eight minor races (Akilians, Carinoids, Scottlingas, Jessuins, Paulos, LentzLandians, Dark Yor, and Snathi).