Ford F-250 (2015) is 569 mm (22.40 inch) longer, 48 mm (1.89 inch) higher and has 97 liters (3.43 ft3) bigger cargo space than GMC Sierra 2500HD (2018).
GMC Sierra 2500HD (2018) is 6 mm (0.24 inch) wider and 493 kg (1,087 lbs) lighter than Ford F-250 (2015).