It's similar, but Phabricator patches are submitted via API to Differential instead of to a mailing list. Phabricator provides Arcanist (arc) to interact with its API from command-line, but some projects has their own tooling around it (e.g. Mozilla uses moz-phab as a wrapper around Arcanist).

Though I think the main selling point of Phabricator is its issue tracker (Maniphest). It is very, very, very nice. May be even the best in class. The company I'm working for switched to JIRA and we still miss Phabricator's.