Up until now, I've always used content panes provided by Views in Panels to accomplish tasks like "Related content" and "Additional information about ABC." I just realized that Views also provides an attachment
display, which as far as I can tell seems to be similar to a content pane except it doesn't require Panels.
However, if I'm already using Panels, are there any use cases where I would be better off using an attachment instead of a content pane, or are these basically the same thing?