GMC Sierra 1500 (2016) is 217 mm (8.54 inch) wider, 87 mm (3.43 inch) higher and has 687 liters (24.26 ft3) bigger cargo space than Mitsubishi Triton (2015).
Mitsubishi Triton (2015) is 59 mm (2.32 inch) longer and 40 kg (88 lbs) lighter than GMC Sierra 1500 (2016).