No, there is an important difference: leaking this verifier does not let an attacker to impersonate user at will. See my other message [0].
Is my understanding correct that you derive two keys from user password, one used for authentication and one for decrypting encrypted content which does not leave the user's computer? In that case, yes, it's somewhat better than the typical scenario, though I personally would still prefer if a proper PAKE was used for authentication. It may not apply to your service, but leaking encrypted data can still result in exposing certain meta-information, which may be important, so it's better to be extra-safe in such matters.
