BMW 1 Series (2014) is 122 mm (4.80 inch) higher, 145 kg (320 lbs) lighter and has 10 liters (0.35 ft3) bigger cargo space than Mercedes AMG GT (2019).
Mercedes AMG GT (2019) is 186 mm (7.32 inch) longer and 191 mm (7.52 inch) wider than BMW 1 Series (2014).