Seems to me you are talking the way Ford plays games with GVWR’s!
Yep, Ford will sell you a F350 SRW with a 9,900# GVWR, or a 12,400# GVWR and several in between!
Exactly.
Fords F350 srw has over 10+ different gvwr numbers depending on year models and three different rawr numbers with payloads all over the place. Even less than some F250 trucks.
If the OP decides on a F350 srw he needs to be aware of all the gvwr/rawr packages. Choosing the wrong F350 srw and it may have less payload than a F250.
Ram and GM 3500 srw vs 3/4 ton owners have reported much the same payload issues depending on year models and how the truck is configured.
Moot points regardless as the OP looking to get a 10k gvwr trailer works fine behind a HD 3/4 ton... gas or diesel truck.