I would say both. I would say it is substantially different, consider the following:
"This is a fundamental flaw in communities on the net in general, they don't gracefully combine different scopes." - Hacker News comment by jacquesm
"This is a fundamental flaw in communities on the net in general, they don't gracefully combine different scopes." - Hacker News comment by jacquesm
But to answer your question, by "graceful combination of scopes" I mean you can follow Hackers in New York (people who have saved Hackers + New York as a favorite) just as easily as you can share stuff with Hackers interested in Ruby on Rails (Hackers + Ruby on Rails) or even with Hackers interested in Ruby on Rails in New York (Hackers + Ruby on Rails + New York).