I base my calculations on that and the assumption that there are no changes other than electrical dimensioning. That would mean 33% more torque, raising 415Nm to 553Nm (that is 305ft lb -> 407 ft lb). The flat torque curve reaches peak power at 5250rpm or 75kph/45mph. Between 45 and 60mph, the torque curve begins to drop but is still above non-Perf. Finally, above 60mph both cars should have similar acceleration.
I found the wikipedia entry on torque most helpful. 415Nm at 7000rpm gives 305kW.