Ford F-250 (2020) is 651 mm (25.63 inch) longer and 93 mm (3.66 inch) higher than GMC Sierra 3500HD (2018).
GMC Sierra 3500HD (2018) is 3 mm (0.12 inch) wider, 579 kg (1,276 lbs) lighter and has 516 liters (18.22 ft3) bigger cargo space than Ford F-250 (2020).