Buick Regal (2016) is 162 mm (6.38 inch) longer and 793 kg (1,748 lbs) lighter than Mercedes G-Class (2020).
Mercedes G-Class (2020) is 74 mm (2.91 inch) wider, 486 mm (19.13 inch) higher and has 265 liters (9.36 ft3) bigger cargo space than Buick Regal (2016).