They are quite different.
Keep in mind my FZ1 has had all the good mods to make it run smooooth! What I like about the FZ1:
Power, it's another game.
Engine braking is real.
Better brakes.
The FZ1 has better parts but it does cost more.
Low end torque.
Much smoother tranny than the 6 or my FJR.
Runs on Regular gas
Dislikes
30 mpg, hey all that power is going to cost you
Mirrors, much better on the 6
Wind protection is less
More work to ride in the twistys, it IS a heaver bike.
Looks like changing plugs will be more work.