Buick Regal Sportback (2020) is 136 mm (5.35 inch) longer and 853 kg (1,881 lbs) lighter than Mercedes G-Class (2015).
Mercedes G-Class (2015) is 5 mm (0.20 inch) wider, 499 mm (19.65 inch) higher and has 17 liters (0.60 ft3) bigger cargo space than Buick Regal Sportback (2020).