Yes there is, actuarial data by the insurance industry showing that the Z1000 or sport-tourers like that have a significantly lower crash rate than super sports bikes of the same power.
They understand risk and stats in this industry -they scoop all the best math grads out of Universities.
The Ninja 1000 is just as "dangerous" as any SS. The Z1000 is nearly physically identical to it, or at least it was before they added traction control to the Ninja 1000. Where there are differences, Z1000 is the sportier of the two!
I could list the differences for 2011:
-Fairing and windscreen
-Bigger airbox & gas tank on N1000
-Dash
-Handlebars
That was about it. Rake was identical, motor was identical (N1000 made a teeny tiny bit more power due to the airbox).