Thanks for feedback. I agree that plausible deniability is a feature that the BIP39-XOR tool may be used for.

Word of caution: there aren't different 3 XOR methods and names. As a matter of fact there is only one - just like there is only one correct addition, multiplication etc. There may be many implementations and they may differ due to bugs (and look/cosmetics like mixed visual encoding in so-called "seed-otp" etc.). I would ask not to perpetuate confusion arising from giving various names to the same technique: "seed-otp", "seedxor", "bip39-xor" are names of implementations/programs that attempt to acheive the same using the same XOR cipher.