There's a big gap between 5th and 6th on the Superduke as well. Less so on the 1190. In fact the 1190 is one of the few bikes that never feels over-geared. It pulls hard in sixth and it doesn't feel like an overdrive. But the 1190 is smoother and much less thudding low down than the 1290s. I.
The KTM 1290 Super Adventure R adds a little spice to this ranking as the sole adventure bike in the lineup. but it produces five more horsepower and pushes the M1000 RR to a top speed of 189
HTCtu.