0-280 km per hour: Mercedes S 63 AMG Coupe vs BMW M5

Motorsport Magazine gives us an acceleration test to 280 km/h between a BMW F10 M5 and the Mercedez-Benz S63 AMG, a quite unusual comparison since the cars do not belong to the same segment. Power outputs though as similar. The S 63 AMG Coupe is powered by a V8 biturbo, a displacement of 5,461 cm3, maximum power of 585 PS, and 1,995 kg total weight. The BMW M5 on the otehr hand is powered by a V8 biturbo engine with a displacement of 4,395 cm3, maximum power of 560 PS and 1,870 kg total weight. So which one takes home this speed test?