Buick Regal Sportback (2020) is 229 mm (9.02 inch) longer, 86 mm (3.39 inch) higher, 73 kg (161 lbs) lighter and has 155 liters (5.47 ft3) bigger cargo space than Nissan GT-R (2016).
Nissan GT-R (2016) is 33 mm (1.30 inch) wider than Buick Regal Sportback (2020).