each to their own, but if I had a 2006 dodge diesel, with only 52,000 miles, paid for, sitting in the garage, that does not need DEF, you could not pry it away from me for any amount of money. That truck is the best pulling diesel, with the least emissions, ever built in my opinion. As far as the 2021 truck, it will pull your trailer, not nearly as good as the diesel, and it will use a lot more fuel doing it. My old 1999 dodge diesel, had 4.11 gears when I bought it, and I put in 3.55's 60 miles an hour is 1,500 rpm, the old engine will pull a house so it just lumbers down the road a little off idle, and that is an 18,000 lb trailer loaded. . You gas truck will most likely need at least 3.73's The worst thing about all the gas trucks I have rode in pulling a trailer is that it seems to work the transmission a lot, they are always shifting gears.