Rider experience being equal the 450 will 0-60MPH just as quick as the Busa.
Not quicker than the Busa, just as quick.
Run the 450 past 60MPH and run the Busa past 60 and when you compare this it looks like you let off the throttle of the dirt bike.
The 450 will have a more consistent pull throughout the RPM range. And its peak will be lower in the RPM range.
Pull some specs on both bikes and look at 1000 RPM increments at the HP/Torque.
Once again the 450 is a powerful machine, but not even close to the Busa as far as HP/Torque. And the difference in the power to weight ratio is significantly to the advantage of the Busa.
This whole post I agree 1,000 percent