No- one set goes through an (at least semi-)standard training process, with public scrutiny upon their every action at a personal level with additional access to public records of most of their related actions, while the other is recruited through familial relations and contacts, with the media investigating the group with a view from a collective standpoint with far more limited resources available.
Perhaps it's useful to think of this as a spectrum rather than a stark distinction. In some places and at some times, police organizations behave in ways that we traditionally regard as "gang-like," while in other places and times, gangs behave in places that we think of as more "civic."
