McLaren GT (2020) is 550 mm (21.65 inch) longer, 278 mm (10.94 inch) wider and has 85 liters (3.00 ft3) bigger cargo space than Mercedes SLK-Class (2017).
Mercedes SLK-Class (2017) is 89 mm (3.50 inch) higher and 116 kg (256 lbs) lighter than McLaren GT (2020).