Ferrari Roma (2020) is 522 mm (20.55 inch) longer and 157 mm (6.18 inch) wider than Mercedes SLK-Class (2014).
Mercedes SLK-Class (2014) is 2 mm (0.08 inch) higher, 115 kg (254 lbs) lighter and has 43 liters (1.52 ft3) bigger cargo space than Ferrari Roma (2020).