Note that if you move the hashed_passwords over, you're using the old SQL 2005 (0x0100) type password hashes SHA1(Binary(UCS2(Password+Salt))), not the newer, very slightly better SQL 2012 (0x0200) type password hashes SHA512(Binary(UCS2(Password+Salt))).

Additionally, if you put the plaintext password in, you'll get a different salt, and the hash will therefore be different between Instance A and Instance B (regardless of version). If you use the hashed_password, any attacker seeing the hashes knows that cracking the one also cracks the other.