When I flew the 650 people said it was the fastest plane between citation service centers. Ours was not so I dont know?
Now I have a friend that operates a 750 and they are always down for maintenance so I could say the same about the 750!
We demo triped a CL300 and it was a great plane. Great numbers, lots of room, and best of all its not a cessna! only thing it needs is auto thrust.