GMC Sierra 1500 (2018) is 232 mm (9.13 inch) wider, 87 mm (3.43 inch) higher and has 687 liters (24.26 ft3) bigger cargo space than Mitsubishi Triton (2014).
Mitsubishi Triton (2014) is 64 mm (2.52 inch) longer and 30 kg (66 lbs) lighter than GMC Sierra 1500 (2018).