> One thing that is not obvious about this mouse is that it has inherently faster speed: more pixels per inch.

> I mean, if you do an A/B test with another mouse with the same computer, and same computer-side mouse settings, you get more cursor movement per wrist movement with the m187.

That's just a bug in the mouse. Certainly nothing "inherent". You should be getting the mouse sensitivity you configure, not that plus a discretionary boost from the mouse.