When I need to find all files with SUID recursively starting from root directory I can do it in two not so different ways:
find / perm 4000
and the second one:
find / perm +4000
Which variant is preferable and why?
When I need to find all files with SUID recursively starting from root directory I can do it in two not so different ways:
and the second one:
Which variant is preferable and why? 


Those are 2 different ways of searching.
So using  or + depends on what you want to find. Examples:
Btw... it looks like the 

