Buick Regal TourX (2018) is 620 mm (24.41 inch) longer and 323 mm (12.72 inch) wider than Mitsubishi Outlander Sport (2020).
Mitsubishi Outlander Sport (2020) is 163 mm (6.42 inch) higher, 202 kg (445 lbs) lighter and has 14 liters (0.49 ft3) bigger cargo space than Buick Regal TourX (2018).