Advocating/preparing/performing a coup is punished no matter what system you want to change into. But propagating totalitarian systems is illegal even if you don't want to do it with a coup.

Also we don't do case law here (if I understand what "case law" means).

On related note we've got hilarious court case where neonazis from ONR were explaining to the court they weren't doing "heil hitler" salute to propagate nazism, but to celebrate Roman traditions. SS signs were for reenactment and swastikas as everybody knows are Hindu symbols of good luck.