Buick Regal Sportback (2019) is 244 mm (9.61 inch) longer, 400 kg (882 lbs) lighter and has 120 liters (4.24 ft3) bigger cargo space than Mercedes GLC-Class (2015).
Mercedes GLC-Class (2015) is 28 mm (1.10 inch) wider and 204 mm (8.03 inch) higher than Buick Regal Sportback (2019).