Question about cloud type

Hi all,

I am wondering if there is an piece of documentation describing the difference between bootstraping juju maas cloud ald local (aka lxd) cloud as well as further use. I found and Juju | How to use LXD with Juju . They are very useful but I would like to dwelve into the configuration, machinie provisioning and configuration topic. Is anyone anware of any other piece of documentation or maybe there is a certain place in juju code one could look into? Thank you in advance.