Q100+s06s: nice torque, almost no noise. But I suspect the motor is a bit worn after running it with S06p. Bad wheel build.
Q100H+s06s: a little loss of torque, more top speed, quite a bit of noise and vibration felt through the pedals.
Q100H+ku65: current setup. Lost a lot of torque, not as noisy as the s06s, but still more noise than I'm used to.
Had a really nice hour and a half on singletrack this weekend running the lowest pas level, so it's not all bad, but I miss the Q100+s06s performance.