Acura RLX (2020) is 622 mm (24.49 inch) longer and 56 mm (2.20 inch) wider than Mercedes GLA-Class (2018).
Mercedes GLA-Class (2018) is 145 mm (5.71 inch) higher, 241 kg (531 lbs) lighter and has 13 liters (0.46 ft3) bigger cargo space than Acura RLX (2020).