Bip39 One. From this place forward the seed may be written on paper or spoken more than phone and this opened up new, Bodily ways of backing up the seed (multiple paper copies in numerous destinations, tough copies on metallic plates with extra protection from fireplace/flood etc.). The BIP39 standard https://tbookmark.com/story18452203/seed-phrase-generate-and-check-helping-the-others-realize-the-advantages-of-bip32-vs-bip39