And there you go .... variance across the same anatomical structure resulting in different outputs, but with a consistent principle. That principle is what lets one pick up any handle and find neutral and know you only ever need move a single knot.
I've played (at length on each iteration) with different handle bends, foam thicknesses and foam position (among other factors), and each has their pros and cons. Where I feel I have a leg up on most is that I am aware of the differences and what I gain and lose on each variance of the possibilities. From there I can pick which one I feel is the best mix for me.
Truth be told, I'm actually in the process (have been for a few months) of circling back to where I started to revalidate things against the knowledge I believe I have gained through the process.