And, if you watch any of the FLT videos, they make a point of saying they use the recommended fuel for every vehicle. They just put 87 octane in the Colorado in the video I just posted. And I would bet (and I will go check) that they used Premium in the EcoBoost in all their tests.
From the Ford owners manual, they would have worse performance (I assume this to mean both acceleration and MPG) with 87 octane (which is still mid-grade, at least in Colorado). So the difference in MPG between the Ford and all the other trucks would be more significant in that case.
