BMW 4 Series (2020) is 112 mm (4.41 inch) longer, 500 kg (1,102 lbs) lighter and has 90 liters (3.18 ft3) bigger cargo space than Mercedes GLC-Class (2017).
Mercedes GLC-Class (2017) is 38 mm (1.50 inch) wider and 276 mm (10.87 inch) higher than BMW 4 Series (2020).