At a high level, they're both just ways to log in without a password, but at a technical level, they're different.
Passwordless uses key pairs and uses password managers to provide them, while the other sends an email link to confirm you have access to an email account.
One uses a private key as proof, the other uses an email account as proof.
But since Passwordless (now Bitwarden) has made the API free, should this be added to this extension, considering the name conflict and similar technology goal, or should this name be changed to avoid confusion and another extension created to fill in that gap?