Mercedes C-Class (Coupe) (2020) is 307 mm (12.09 inch) longer, 10 mm (0.39 inch) wider, 114 mm (4.49 inch) higher and has 206 liters (7.27 ft3) bigger cargo space than Porsche 718 Cayman (2014).
Porsche 718 Cayman (2014) is 109 kg (240 lbs) lighter than Mercedes C-Class (Coupe) (2020).