actually it's a win win between the two cars, the merc has the torque and displacement advantage and it's much more of a drag racer, even a base model sls amg (not even black series) does the quartermile in 11.1 sec, the 599 gtb only does 11.2
https://i.insider.com/62a94634ac534e00193351a6?width=1136&format=jpeg
I love Merc