The cars are very evenly matched in the video despite the Ferrari being lighter. On paper, the motors are rated at similar output with the 6.2 liter V8 in the SLS rated at 563 horsepower and the 4.5 liter direct injected unit in the Ferrari rated at 562 horsepower.
So how is the SLS able to keep up despite more weight? The M159 V8 under the hood from all dyno results posted thus far is putting out more rear wheel horsepower than the 458 in stock form. With more power and torque it is able to negate the weight difference.
Very good runs showing evenly matched cars, come to your own conclusion on the actual power output of the two cars.