join walls with the join or join walls-command?

[matteoluigi]

Hi folks,

 

there exist  two commands in VW which help me by joining walls. A "join"-command, which also can join lines for example from the menu and a "join walls"-Command from the tool-set (which of course is more apropriate for joining walls, because I can chose the way I want to join those walls (T, L, X, merge wall-components or do not merge wall components).

However I am questioning myself wether I make a mistake when I join walls with CMD-Shift-J or CMD-J.

 

What is the technical difference?