Mercedes GLA-Class (2016) is 50 kg (110 lbs) lighter than Mercedes GLB-Class (2019).
Mercedes GLB-Class (2019) is 210 mm (8.27 inch) longer, 30 mm (1.18 inch) wider, 165 mm (6.50 inch) higher and has 149 liters (5.26 ft3) bigger cargo space than Mercedes GLA-Class (2016).