I bought a 2014 FX4 last August and it has been great. I went from a 2005 F150 with the 5.4 to the Eco, wow is all I can say when it comes to pulling.
Below is a part of a report I posted last August on another site comparing the 5.0 to the Eco for towing
My old truck was a 2005 F150 with the 5.4 and 3.31 rear end, so I have been used to pulling my boat with that for a while.
Both new F150’s had the 3.55 rear end, the 5.0L FX4 truck was fully loaded on the inside and 20″ tires/rims. The Eco boost had the standard FX4 interior and 18″ tires/rims (tires on both were all terrain)
I test drove the 5.0L with the boat first. It had good acceleration on the uphill on ramp to the highway with the nice V8 rumble. At cruising speed (70mph) it didnt need to down shift when going uphill on the highway (not a major hill though). When I accelerated to pass someone, it would down shift and you could feel that the boat was back there but is was a definite improvement over what I have been used to. When exiting the highway, the braking was not much different that what I have been used to (no trailer brakes for me). From the highway, we went onto a country backroad with more hills. The truck would downshift more often on this road (55 to 60mph and not using tow haul mode). Regarding any hesitation when towing, when I accelerated to pass someone, the downshift and acceleration was instantaneous but I could tell I was pulling the boat. From a stop, there was no hesitation on acceleration. Overall, I was impressed with the performance compared to what I was used to.
Next we hooked up to the Eco Boost. When pulling out from a stop sign, there is a slight hesitation (I would guess it to be less than 1/4 sec) but then you accelerate very well (better than the 5.0). Going uphill on the same on ramp to the highway, the acceleration is noticeably better than the 5.0 and it seemed to me that if the truck was already moving, the slight hesitation mentioned above was no longer there. Cruising speed on the highway was the same as the 5.0, it didnt downshift at all when going up small hills. When I accelerated to pass someone, you could not feel that there was a boat behind me at all – the acceleration made me think holy $^%#!. I noticed it and the Salesperson was the first to say it out loud. When exiting the highway, braking was no different than the 5.0L. When driving on the country backroad (55 to 60mph), the truck did not down shift at all (not using tow haul mode)
Once I got done with both test drives, there were 3 other people that asked which truck pulled the boat better (dealer employees) as they have never had anyone test drive both while towing something.
Just from research, I expected there to be a little difference between the 2 motors, but I was very surprised at how much the Eco boost outperformed the 5.0 while towing.
It would expect that when not towing, it would be much tougher to tell a difference in performance between them.