Cadillac CT6 (2018) is 1050 mm (41.34 inch) longer, 63 mm (2.48 inch) wider, 170 mm (6.69 inch) higher and has 98 liters (3.46 ft3) bigger cargo space than Mercedes SLK-Class (2014).
Mercedes SLK-Class (2014) is 208 kg (459 lbs) lighter than Cadillac CT6 (2018).