mysqlx versus xdevapi node module what's the difference?

[Andy Fusniak]

I have installed the Node.js connector (@mysql/xdevapi@8.0.8) using

npm install @mysql/xdevapi

The X DevAPI User Guide code examples all appear to use

var mysqlx = require('mysqlx');

See the following link for full example code.
https://dev.mysql.com/doc/x-devapi-userguide/en/using-sql.html

Can I simply replace this with

const xdevapi = require('@mysql/xdevapi');

The xdevapi exposes an API that includes xdevapi.getSession() but the mysqlssh shell has a specific getNodeSession() function- is this correct?

In the Node.js xdevapi, how can I distinguish between XSession and single database specific NodeSessions?

Can someone explain please?