Mercedes GLC-Class (2020) is 198 mm (7.80 inch) longer, 87 mm (3.43 inch) wider, 389 mm (15.31 inch) higher and has 166 liters (5.86 ft3) bigger cargo space than Porsche 718 Cayman (2021).
Porsche 718 Cayman (2021) is 649 kg (1,431 lbs) lighter than Mercedes GLC-Class (2020).