Buick Regal Sportback (2020) is 6 mm (0.24 inch) wider than Opel Insignia Country Tourer (2017).
Opel Insignia Country Tourer (2017) is 13 mm (0.51 inch) longer, 58 mm (2.28 inch) higher, 142 kg (313 lbs) lighter and has 70 liters (2.47 ft3) bigger cargo space than Buick Regal Sportback (2020).