I have decided to give my father the Winston rod and let him decide if he likes the rod even if Sage One (or stiff rods from other makers) might be somewhat better in strong wind.
I did a "waggle" test at home and compared the 7wt 10ft Winston BIIIx to my 6wt 9ft Guideline Fario and found it similar or even slightly stiffer than my Fario (medium-fast). I'm hoping the weather will allow us to cast in the next few days. (I also have a Guideline Lpxe Switch rod that needs testing)
Thanks for the help!