Mercedes AMG GT (2020) is 153 mm (6.02 inch) longer and 153 mm (6.02 inch) wider than Mercedes B-Class (2017).
Mercedes B-Class (2017) is 268 mm (10.55 inch) higher, 250 kg (551 lbs) lighter and has 136 liters (4.80 ft3) bigger cargo space than Mercedes AMG GT (2020).