Originally Posted by PeterW
I've owned both. Admitted one of the very old F650's.
We're not discussing the thumper here. The "very old" F650 was about 20 less HP than a DL, a little less torque, and a narrower seat.
The modern twin, 800 cc "F650" puts out the same HP (approx) and more torque, starting earlier. It's power is very tractable and smoothe, and it's weight is carried lower.