Mercedes GLB-Class (2020) is 260 mm (10.24 inch) longer, 34 mm (1.34 inch) wider, 366 mm (14.41 inch) higher and has 408 liters (14.41 ft3) bigger cargo space than Porsche Cayman (2014).
Porsche Cayman (2014) is 1113 kg (2,454 lbs) lighter than Mercedes GLB-Class (2020).