I want to say Bonapartism refers more to when a military figure does a coup and subverts a revolution, “third positionists” tend to want to take power electorally by presenting themselves as a shiny new alternative, but in both cases revolutionary sentiment is co-opted to support something closer to the status quo and in both cases the appeal to the masses is that the governing party is perceived to be above or outside of the class struggle as opposed to directly siding with either of the two major classes … but I’m also no expert. The president of El Salvador for example throws off big third positionist vibes in my opinion.