Hubzilla introduced the nomatic identity. That means that your identity is not linked with the address of the server. You can move from server to server or have clone. You can use a server or an other one easily.
Streams has the nomadic identity but I tryed to import my hubzilla channel and it does not work. It is like Streams and Hubzilla is not compatible concerning nomadic identity. Of course hubzilla account can talk with streams account.