Mazda 3 (Hatchback) (2014) is 300 kg (661 lbs) lighter than Opel Insignia Sports Tourer (2020).
Opel Insignia Sports Tourer (2020) is 453 mm (17.83 inch) longer, 60 mm (2.36 inch) wider, 58 mm (2.28 inch) higher and has 196 liters (6.92 ft3) bigger cargo space than Mazda 3 (Hatchback) (2014).