Mercedes GLA-Class (2020) is 31 mm (1.22 inch) wider, 341 mm (13.43 inch) higher and has 251 liters (8.86 ft3) bigger cargo space than Porsche 718 Cayman (2020).
Porsche 718 Cayman (2020) is 48 mm (1.89 inch) longer and 112 kg (247 lbs) lighter than Mercedes GLA-Class (2020).