Fucking labels. I have done the research on communism, socialism, capitalism, authoritarianism, Buddhism, taoism, etc.
Not a single real life person I've ever interacted with matches up with these labels. My personal experience with tankies (another label I don't get besides being in specific dumb instances) almost messes with that but nah.
Most Marxists follow certain tendencies, ie Marxism-Leninism, Maoism, Trotskyism, etc. These tendencies arise from believing certain aspects to be relative to local conditions, or universal, such as the concept of Protracted People's War. Communists in general will agree within tendencies because if you agree with certain foundations, then there are "correct" and "incorrect" conclusions.