Lexus RX (2017) is 511 mm (20.12 inch) longer, 95 mm (3.74 inch) wider, 427 mm (16.81 inch) higher and has 359 liters (12.68 ft3) bigger cargo space than Porsche Cayman (2017).
Porsche Cayman (2017) is 585 kg (1,290 lbs) lighter than Lexus RX (2017).