This "totalitarian" talk can sound technical, but it's just politics. It's just one step away from the equally polemical "authoritarian" talk.
In reality, these polities are completely different types of regime. Applebaum herself defines them negatively, as "anti-liberal."
Applebaum: What binds Russia, China, Iran and North Korea is not religion or ideology.
China is communist, Russia nationalist, Iran theocratic. What binds them is fear of liberal language: rights, rule of law, separation of powers and independent courts. 1/