INFINITI Q50 (2014) is 441 mm (17.36 inch) longer and 10 mm (0.39 inch) wider than Mercedes GLA-Class (2018).
Mercedes GLA-Class (2018) is 168 mm (6.61 inch) higher, 192 kg (423 lbs) lighter and has 53 liters (1.87 ft3) bigger cargo space than INFINITI Q50 (2014).