Audi R8 Spyder (2020) is 5 kg (11 lbs) lighter than Cadillac XT4 (2021).
Cadillac XT4 (2021) is 173 mm (6.81 inch) longer, 5 mm (0.20 inch) wider, 365 mm (14.37 inch) higher and has 411 liters (14.51 ft3) bigger cargo space than Audi R8 Spyder (2020).