The two trucks are "nearly" exact twins... BUT, the 250 is rated and tagged as a 3/4 ton vehicle and the 350 is rated and tagged as a 1 ton. This is the reason for the difference in the GVWRs. In the east as well as some places across the country, many of the local roads are restricted by vehicle capacity. Where I live, there are signs that prohibit vehicles above a 3/4 ton rating, from traveling on many of the local roads unless they are there to deliver or pick up from an address that is on that particular road.I have been interested in this too. I know that the F350 has overload springs but I was looking at the capacities and weights from Ford. For a similarly equipped truck CrewCAB 4x4 PSD 156.2" WB SRW.
The payload difference between the F250 and F350 is shown but the numbers do not make sense to me. for example the trucks will weigh the same correct? so the F250 has a 10,000 lb GVWR with a max payload of 3250 lbs.
The F350 has a GVWR of either 11,300 lbs with a max payload of 4420 lbs or a GVWR of 11,500 lbs with a max payload of 3990 lbs.
What I don't understand is that for the same truck shouldn't GVWR correlate directly into more payload I don't understand how GVWR goes up 200 lbs and Payload goes down 430 lbs?
The other thing I don't understand is that when fifth wheel towing the numbers for the F-250 and F-350 trucks are the same except in the configuration I mentioned above in which the F350 is rated about 1300 lbs higher, however they are rated identical for that configuration with 2wd.
I can travel these roads in my F250, but a friend with his F350 can not do so unless he wants a hefty citation for his trip.
The variation in the 4X4 and 2WDs is due to the difference in the weight of the added drive train in the 4X4. Thus the reason for the difference in payload.