Ford F-350 (2014) is 698 mm (27.48 inch) longer, 362 mm (14.25 inch) wider and has 219 liters (7.73 ft3) bigger cargo space than GMC Sierra 3500HD (2020).
GMC Sierra 3500HD (2020) is 1 mm (0.04 inch) higher and 613 kg (1,351 lbs) lighter than Ford F-350 (2014).