I've not ridden a Goldwing, and not yet received my F6B, so can't comment from experience with those two bikes.

However, I did own a BMW R1200RT for a couple years. It's tall and a little top heavy, but rides a treat and has lots of the bells and whistles that make it a superb piece of machinery. The new 1600 is even more so, I hear. But before that I also had a BMW R1150R, nearly the same engine, less stuff, not so tall. Before I had the RT, I added a bunch of stuff to the R to make it more like an RT. Removable bags - which were great - top case, windshield, gps, etc. It was a capable touring bike that way, though lacking in some of the comfort features of the RT. I thought that was what I wanted, and I traded it up to get the RT, but regretted the decision after a few hundred miles or so. The RT was a great touring bike, but the R was a great bike. What you gain in specialization, you lose in utilitarianism.

I think (I hope!) the same can be said for the F6B, which is what drew me to it in the first place. I've wanted a Goldwing for as long as I've owned motorcycles, but always rode something a little smaller and more affordable for the budget. Not needing or wanting to ride two-up, the F6B really appealed to me. The Goldwing is a superb touring bike, no doubt about it. But the F6B can be made to be nearly as complete a touring bike as the full size wing. Everything that separates the two bikes, with the exception of the reverse gear, and air bags, can be added to the F6B if you want. Navigation, some kind of cruise control, top case, heated seats, etc. If you want it. The beauty of the F6B is that it's not so specialized that you can't make it into what you want it to be. Which is part of the fun of having a bike in the first place.