Slow, tight maneuvering requires more weight to be forward on the front tire - and HDs have a significant edge there.
The motor and gas tank are pretty much forward of the frame midpoint - hence why all the motocop cone drills are done on Harleys. Look at their seat too - pushed over the gas tank in most cases.
For the F6B - next time you are in a close quarters scenario - try leaning forward at the waist without putting extra pressure on the handgrips. I think you'll like what you feel.
Cheers,
Steve