the F800s have an underseat fuel tank...
the fake tank is where the air box and battery is located...
handles really nice and suspension is plush for me at 200lbs...
Love my F800ST also; that underseat gas tank does amazing things for flickability.
The ST was a hair quicker in the 1/4 than the 696 that Motorcycle Consumer News tested and a full second slower than the Street Triple. So a kinder, gentler, more expensive naked is what the F800R will likely be.
Thought the R would come with a fully adjustable rear shock and USD fork, which it doesn't, BUT, and this is a huge BUT, the awful ABS on the F800 series is said to be "fixed" on the R, (ie. no more "releasing" in the dry, randomly, over bumps, adding 2 bike lengths to your dry stopping distance).
Don't believe the Duc or the Triumph offer ABS so if you gotta have it for your naked, the BMW will be the only way to go.
If I were to get a mid sized naked, which I'm thinking of to replace the old 1000cc, it would, without question, be the Street Triple R, (if, at 6' 1", I fit on it).