Fortunately 1800 lbs is ample for our needs. The F250 is much beefier all 'round compared to our old F150, but if we were looking for a new truck, the new F150 appears to be far superior than our 3/4T for payload. It's all rather confusing...
The two trucks you mentioned is a great example of the fallacy of the GVWR payload sticker system.
Ford Fleet specs shows as much as 3000 lb payloads on some F150HD or tow max packages. The new aluminum F150 is advertised up to 3300 lb payload.
Non of the F150HD or max tow with those small 4050-4800 RAWR can carry 3000 lbs in the bed.
Weight (approx) numbers tell us the F150 may weigh 2500 lbs on the rear axle. Now add 3300 lb payload in the bed of any F150 and suddenly the rear axle has 3300 plus 2500 = 5800 lbs on the F150 rear axle. We now have a severally over loaded trucks semi-float rear axle/wheels/suspension and rear axle brakes.
Now look at a F250 with its 6200 RAWR which may weigh 2800 lbs when empty. Now add the same 3300 lb payload = 6100 lbs. The F250's rear axle/tires/wheels/suspension and brakes are not over loaded.
No where does Ford tell us to put the 3000 lb payload in the bed of a F150. They simply state the truck has a 3000 lb payload.
Now its up to the truck operator to not exceed the trucks RAWR which will carry most if not all of a trailers hitch weight.