Mercedes GLA-Class (2020) is 18 mm (0.71 inch) longer, 33 mm (1.30 inch) wider, 316 mm (12.44 inch) higher and has 285 liters (10.06 ft3) bigger cargo space than Porsche 718 Cayman (2017).
Porsche 718 Cayman (2017) is 122 kg (269 lbs) lighter than Mercedes GLA-Class (2020).