Ford F-250 (2020) is 650 mm (25.59 inch) longer and 119 mm (4.69 inch) higher than GMC Sierra 3500HD (2015).
GMC Sierra 3500HD (2015) is 3 mm (0.12 inch) wider, 591 kg (1,303 lbs) lighter and has 516 liters (18.22 ft3) bigger cargo space than Ford F-250 (2020).