“Communist” is blurry (many anarchists might also call themselves communists), but the school of thought most associated with “communism” in common parlance is Leninism, and there are in fact deep differences between that and all schools of anarchism.

Leninism (including branches like ML, Trotskyism or Maoism) advocates for a strong, centralised “vanguard party” to carry out the revolution that doesn’t have to be itself democratic. Meanwhile anarchists reject all hierarchies and therefore organise as loose federations of small groups that often seek to empower the individual. (Both are liable to turn into sects lol)

So there is a very practical difference in how they feel and are run day-to-day. That only goes for people who actually go out and join some kind of organisation though, which is pretty rare for these ideologies.

Ah yes an opinion from ‘buttnugget’ which is definitely well researched and has evidence to support