Buick Regal Sportback (2019) is 210 mm (8.27 inch) longer, 85 mm (3.35 inch) higher, 25 kg (55 lbs) lighter and has 155 liters (5.47 ft3) bigger cargo space than Nissan GT-R (2020).
Nissan GT-R (2020) is 33 mm (1.30 inch) wider than Buick Regal Sportback (2019).