It’s the battle of the rag tops as Roland Tameling and Michiel Willebrands compare the Mercedes-Benz SLS AMG Roadster with Maserati’s GranCabrio Sport model. The SLS AMG is powered by that glorious 6.2 L V8 which produces 420 kW (571 hp) and 649 Nm (479 lb-ft) of torque, while its Italian rival uses a 4.7 L V8 that develops 331 kW (450 hp) and 510 Nm (376 lb-ft).