The Hirshhorn’s not like other museums in town. You’ll rarely see a run of masterpieces to match an art history textbook like you’ll find at the National Gallery of Art. The Hirshhorn doesn’t trumpet the work of its namesake founder, the way that the Phillips Collection builds exhibitions around the vision of Duncan Phillips. And the Hirshhorn isn’t a crystal-cool stage for a handful of elite artists, a la Glenstone.