Cadillac CT6 (2018) is 1145 mm (45.08 inch) longer, 145 mm (5.71 inch) wider and has 49 liters (1.73 ft3) bigger cargo space than Chevrolet Sonic (Hatchback) (2018).
Chevrolet Sonic (Hatchback) (2018) is 33 mm (1.30 inch) higher and 433 kg (955 lbs) lighter than Cadillac CT6 (2018).