F 350 is not taxed near as much as the Land Cruiser .
For that reason the F 350 is not using up as much of it's useful life as the LC .
The F 350 is less likely to overheat the tranny or the brakes .
If you overheat the tranny in the LC you get to rebuild it .
If you overheat the brakes on the LC you get to replace the rotors due to warping .
An extreme example but applicable .
The F 350 will allow a heavier tongue weight .
Heavy tongue weight mitigates / eliminates trailer sway .
No trailer sway saves your life when you go too fast into an unexpected curve .
An extreme example but applicable .