F-150 is not the same as Expedition. They are similar, but the frames are unique, suspension, etc.
The 5.4L went from 2valve per cyl to 3 vales for 2004 F-150. That improved HP by 15%, torque by a little. 2007+ Expy and 2009+ F150 went 4spd->6spd trans. That's huge as far as real world towing experience goes. Look at the gear multiplication from this of 4-spd to 6-spd. Even ignoring the Ecoboost's extra torque advantage over 5.4L, the gearing of the trans from the 6-spd (and now 2014+ 8spds) is huge impact in wheel torque and real world towing experiences.
