Several years ago we had a new 2016 SRW F-350 diesel when we purchased our 42' Cardinal that weighed in (gross) at 16,500+ and at that time the pickup was rated at 16,000 for fifth wheel towing. I was shocked that towing for an F-250 and F-350 SRW was exactly the same...16,000 pounds.
We towed a couple of months and decided we really needed a dually, so we traded up to a 2017 DRW F-350. The difference was amazing. Absolutely never had another white-knuckle day on the road. Was it harder to park...yes, certainly it was. Was it a bit more expensive to drive, yes it was.
Did it give us a MUCH stronger feeling of safety for ourselves and others - YES IT DID!!