"Over-analyzing"????
Oh heck no.
Gathering data prior to a purchase to make an effective purchase is always worthwhile - unless you are Steve 0080 and buy whatever is "next" to just try it out.
The other pertinent distance I didn't see in that graphic was the horizontal distance from "nose-to-windscreen."
That's got to play into the equation somehow as well.
I'm still shopping as well......comfortably looking over the windscreen is imperative to me.
Good luck,
Steve