Buick LaCrosse (2019) is 600 mm (23.62 inch) longer and 132 mm (5.20 inch) wider than Chevrolet Sonic (Sedan) (2017).
Chevrolet Sonic (Sedan) (2017) is 55 mm (2.17 inch) higher, 287 kg (633 lbs) lighter and has 17 liters (0.60 ft3) bigger cargo space than Buick LaCrosse (2019).