soc sec advocate or soc sec attorney

[elleng]

1. You don't need an attorney to apply for Social Security

if you seek the simple/ordinary benefits; applying is easy. If there are complicating factors, like disability etc, that's another story, and its possible that without an experienced attorney, benefits will be delayed or denied.

http://www.socialsecurity.gov/pgm/retirement.htm

If you are asking the difference between a so-called 'advocate' and an 'attorney,' I suspect the main difference would be between the relative records of success between individuals you are considering.