If I had to bet on who would win Kaiserreich’s 2nd ACW based solely on the setting as opposed to gameplay mechanics and whatnot (obviously the mod’s gonna make things a bit more balanced to keep things interesting), the Combined Syndicates is pretty clearly the most favored faction IMO. It has greatest population and industrial capacity by a considerable margin (for context, six of the ten largest cities in the US circa 1930 are located in the CSA), so without foreign aid, there isn’t really a way for another faction to come out on top in the long term. In this sense, the 2nd ACW would plausibly be a repeat of the first in terms of what regions are at an advantage, and the Combined Syndicates is effectively inheriting the advantages of the Union. I think there’s also something to be said for the ideological advantages of being a democracy that lets both women and minorities participate equally in the armed forces. Do you really see a lot of African-Americans in the AUS joining the war effort to fight alongside the Silver Legion?