Cadillac CT5 (2020) is 545 mm (21.46 inch) longer, 82 mm (3.23 inch) wider, 160 mm (6.30 inch) higher and has 175 liters (6.18 ft3) bigger cargo space than Porsche Cayman (2015).
Porsche Cayman (2015) is 255 kg (562 lbs) lighter than Cadillac CT5 (2020).