Why would it be helpful? The only thing you really need to know is that the Pub Regular group allows you to use the forum attachments system.
The other visible groups (with the exception of staff, obviously) are just titles that don't give any special permissions. They are just to denote awards (POTM, etc) or to denote that someone is ex-Muslim or Muslim. Permissions are exactly the same as the standard basic member.
That is only I wanted to know, I wasn't aware everyone else had the same permissions. Sometimes some users have different colors etc.