websockets after upgrade are not message based like the same as socket.io (which adds fallback/fall-forward) and sockjs does this providing a stream interface...
If you don't need to support a web browser client, you don't need the extra overhead.. and if you do, you're better off just using socket.io or shoe and having your server in node.js ... as an aside, I'd probably just use raw sockets in node if I didn't need browser support.
