Congrats on your weight loss Jim!!!
Keep them off during X-mas time!
Regarding the F6B or full Wing: I rode both before my purchase of the B.
With 6.3" and 34 inseam I sat much better on the B, the position was less cramped. The seat of the Wing fixes your position and doesnt allow you to slide backwards and stretch some more. My knees were more bent on the Wing and the handlebar seemed too close.
Besides that i preferred the look of the B without the trunk. My wife is very happy and comfortable riding on the back of the B.
Then 2 month ago I made it even better by having the seat customized at my local upholstery, 2" higher up and 2" more backwards. i also added highway pegs to relax my legs from time to time.
Now add some adjustable Helibars and there you have perfect Batmobile.