0-60 and top speed match pretty closely. Im going to go way out on a limb, and say the SLR wouldnt just walk away. I think when you are comparing that much power and torque in both cars, the driver is really going to make 100% of the differance.
That said, I'm sure that SLR is so smooth, it makes the new vette seem seem outdated... despite the fact that its outperforming $90k+ porsches in speed, acceleration, and handling.
...Plus, I'll never afford a Brabus SLR,