Mercedes GLA-Class (2014) is 719 mm (28.31 inch) longer, 84 mm (3.31 inch) wider, 10 mm (0.39 inch) higher and has 34 liters (1.20 ft3) bigger cargo space than Opel Adam (2020).
Opel Adam (2020) is 309 kg (681 lbs) lighter than Mercedes GLA-Class (2014).