FWIW, all of them ought to have the same stiff Huano button switches and rather soft, rubbery wheel with a lighter switch.
By soft you must mean mushy with a ****ty feedback while skipping notches
The switch is the same as in some other mouses, e.g. old Genius NetScroll Optical. It just requires less force than Huano. For me, it was a big surprise that the wheel was actually lighter than the primary buttons.
If you mean scrolling steps, I actually like the scrolling action as well, although it could be smoother.