Buick LaCrosse (2018) is 600 mm (23.62 inch) longer and 63 mm (2.48 inch) wider than Mercedes GLA-Class (2015).
Mercedes GLA-Class (2015) is 33 mm (1.30 inch) higher, 188 kg (414 lbs) lighter and has 16 liters (0.57 ft3) bigger cargo space than Buick LaCrosse (2018).