Just finished a Savinkov Russia playthrough today, and I don't think I really understood what the different factions of Savinkov's party really are. I understand that its dynamics largely imitate the NSDAP in OTL but still don't really understand their exact positions.
Solidarists (Least Insane): Equivalent of the Strasserites in OTL. Supports a large amount of socialist style reform but are still very much fed on racism.
Old Svobodniks (Insane): Reactionaries in a different color, Monarchists without the king. They still want to cling to a strongman. Rabidly anti-syndicalist but other than that have no real positions. Not for anything, but defined by their antagonism to socialism.
Eurasianists (World-endingly insane psychopaths): Inspired by Ivan Ilyin, believe that Russians belong to the Kaiserreich master-race hodgepodge of Mongols, Turks, Russians (and all the Russian minorities) were hit by space-magic and are now ascended as the rightful rulers of this world. Equivalent to how the Nazi party evolved in OTL with their Aryan race stuff, entire ideology is formed from a fine mix of distilled racism and pseudoscience.
This is the jist of what I got, I couldn't really tell since the narrative seemed to focus more on Savinkov.
Also this might just be a personal experience but Savinkov loses his fucking mind (either literally or metaphorically) in 95% of the games I play.