Gear ratio advice 3:73 or 4:30 on Super Duty

The srw is offered in 3.31 and 3.55. The dually in 3.73 and 4.30. I pull very heavy trailers in sometimes very soft ground with my 3.55 ratio. (I sometimes pull over 30,000 lbs with my truck). I put just under 100000 miles on my 2011 and had zero issues with it. These new trucks are capable of putting 23000 lb ft of torque on the rear axle in low gear with a 3.55 ratio rear end. I hardley notice a trailer behind me starting out with the 3.55 axle. Don't even think about putting a 4.30 in your truck. If want more torque on your axle to back a trailer onto some blocks or pull it though mud or soft ground you can always shift to 4 low. In 4 low you can stick a 6" block behind your trailer wheel and the truck will push a 16,000 lb trailer up on the block by shifting the transmission into R and removing your foot from the brake. I wish I could have gotten a 3.31 ratio in my new Platinum but that ratio is not offered with 20" wheels. (Which all Platinum srw trucks come with)