GMC Sierra 1500 (2015) is 3 mm (0.12 inch) wider, 540 kg (1,190 lbs) lighter and has 315 liters (11.12 ft3) bigger cargo space than Nissan Armada (2020).
Nissan Armada (2020) is 85 mm (3.35 inch) longer and 58 mm (2.28 inch) higher than GMC Sierra 1500 (2015).