In this case it wouldn't even qualify as circumstantial evidence considering the claim is manifested from a fictitious scenario. For every forum post of a BMW outpacing a Panigale, there is another stating the opposite. There would certainly be variables associated with any testing method, including dyno calibration, but as variables are more effectively controlled, conclusions can be made with greater accuracy. An engine dyno would be a good step towards testing your suspicions under a more sufficiently controlled environment.
How about you spare me the suspense and share your evidence, other than the claim by Ducati marketing department, that the engine produces 195HP?