The 2017 Armada is even closer to a Patrol. It is a decontented QX80.
The first QX56 was based off the Armada platform (stuff added to try and make it a luxery version), the second time around the Armada is based off the QX56 but is decontented for the Nissan customer instead of the Infiniti customer.
The QX56/QX80 after 2011 is based on a global Patrol platform, as is the 2017 Armada.