Ford F-250 (2014) is 570 mm (22.44 inch) longer and 47 mm (1.85 inch) higher than GMC Sierra 3500HD (2018).
GMC Sierra 3500HD (2018) is 6 mm (0.24 inch) wider, 2955 kg (6,515 lbs) lighter and has 176 liters (6.22 ft3) bigger cargo space than Ford F-250 (2014).