I might find a different approach here: As most questions if you already know the answer this may seem too obvious. To me unfortunately is not and I'll explain why: -The size of the bikes is almost the same, in lenght, being thr F narrower than the R. -The backreste is the same, given that you have the aluminum top case. So where does the comfort difference come? wider seat? Better wind proteccion? The suspension? If so, an F bike could become as or even more comfortable than a stock RGS if you get a big screen, handlebar risers and a custom wide seat, while retaining the nimblenes for lane splitting. What would you say? or what do you know?