Section type in XPages

I noticed for a section you can specify the type. However when I select the different options in the browser I do not notice so many differences except some padding/margin differences.

However in Designer I notice that the section tries to take form the section types known in traditional Notes.

Is this a XPages in Notec Client only thing or is it just not supported in the web?

Section type = tab looks similar to a tabbed panel to me: