F350 Super Duty vs 3500 Denali vs The Ike Pulling 30k lbs

I think one factor that many people overlook here is that the power numbers for the trucks are not constant and they are always changing. Many things can alter these numbers like temps, turbo efficiencies and so on. You can have one truck that is great for short burst runs making a lot of horsepower unloaded, but cannot sustain that same power output. This is why some trucks may be hot rods when unloaded or in short loaded runs, but they are more effected when loaded especially over long distances because it cannot keep those high power levels for long periods of time.

There are also trucks that are more effected by altitude due to their turbo sizing and efficiency while others aren't. You can also have one truck that is great in cold temps, but not so great in warmer temps where it cannot sustain the same power output it can in colder weather. There are many factors that play into how much power a certain engine makes in certain conditions, and not all engines are effected the same way.