Buick Regal Sportback (2018) is 534 mm (21.02 inch) longer and 323 mm (12.72 inch) wider than Mitsubishi Outlander Sport (2020).
Mitsubishi Outlander Sport (2020) is 191 mm (7.52 inch) higher, 262 kg (578 lbs) lighter and has 144 liters (5.09 ft3) bigger cargo space than Buick Regal Sportback (2018).