Difference between Outline and Group

What’s the difference between an Outline and a Group? They both seem to have the same capabilities as far as I can see …

Creating an outline is just a shortcut for creating a group with a visible checkbox.

Got it. Thanks.


Does this mean that you should not keep an outline in the same folder as other documents? My understanding is that the AI works best if groups and documents are not in the same group. Does this apply to outlines as well?