I mean if you wanted to make that point just make it man, no reason to beat around it so much. Either way I would simply say the Stasi learning from the Gestapo is no different from the Gestapo learning from the Cheka, who probably learned things from Russian Empire police, who probably learned things from European colonial policing. Secret polices are just a tool of authoritarianism I wouldn't suggest one learning from another is a continuation of persistence of a specific ideology, you could probably trace a lot of the stuff the Gestapo were doing back to revolutionary France.