Buick Regal TourX (2018) is 440 mm (17.32 inch) longer, 194 mm (7.64 inch) higher and has 250 liters (8.83 ft3) bigger cargo space than Mercedes AMG GT (2019).
Mercedes AMG GT (2019) is 77 mm (3.03 inch) wider and 37 kg (82 lbs) lighter than Buick Regal TourX (2018).