Yea right up until you get to a corner
Those pickups are mostly quite crap, except for the engine lol
What's a corner?

"Technically" the engines are there so they can pull massive loads with ease, in reality the only stuff "hauled" by most of them are a set of bikes for the kids or cool box for a picnic. Does make them fun though, rather than the slightly lumbering rest of the world diesels.
The smaller ecoboost (2.7) does appear to have better fuel consumption than the bigger engines (like the 5.0 Coyote), but it's also down on power and torque. The larger ecoboost (3.6) provides similar power and more torque than the 5.0, but has a similar fuel economy.
From a fuel economy point of view they're all a bit crap, but the ecoboosts are quite popular because the torque curve is supposed to be a lot more usable, the turbos giving more grunt low down rather than at 5,000rpm with the NA Coyote (which will rarely get above about 2,000 RPM in normal day to day driving, in he pickup form).