What is "Calculate Extended Optimal Printing Orientation" and how is it different than fast?

[A-Metal-Penguin]

I apologize if this is not the right place to ask this. I am new to Github and don't know where to ask a question. This isn't exactly an "issue." Love this plugin. ♥🐧🤖

Fast:

Extended Optimal:

If I had to guess, extended optimal means to sacrifice speed for stability.
But.... it's hanging the object? That's more stable? Maybe it is if I use supports? I'm confused.