Fortress or Resilient City?

In economic or social collapse, which will fair bette, or will both fair well but in different ways(?) :

1. Underground fortress. [link]
2. Resilient cities. [link]

I think certain cities will have the advantage of talented people, trade of diverse goods (e.g. computers and potatoes). Their downside may be criminal/terrorist class predators. For the fortress, all the opposites are in play: a shallow talent pool due to small group.

One vision of the future might tip the advantage to an underground fortress: A world where inventions and knowledge are open sourced and shared efficiently across the internet, and travel of any kind become an anomaly because of extreme expense. In this case a fortress able to secure its own food, water and electricity would have access to the "world mind".