Cadillac CT4 (2021) is 48 kg (106 lbs) lighter than Opel Insignia Sports Tourer (2020).
Opel Insignia Sports Tourer (2020) is 158 mm (6.22 inch) longer, 42 mm (1.65 inch) wider, 91 mm (3.58 inch) higher and has 257 liters (9.08 ft3) bigger cargo space than Cadillac CT4 (2021).