I ended up test driving the F-150 today, both the V8 and the Ecoboost back to back. Just some brief thoughts. As for the truck itself, I came away extremely impressed. I test drove the XLT Lariat as leather is a requirement for me. I found the cabin at highway speeds to be just as quiet, if not quieter than the Tundra, with the overall ride on city streets to be a fair bit smoother.
Interior wise, I really liked it a lot. The panoramic roof was a nice touch for sure. The seats were very comfortable, although I'd probably give the nod to the Tundra in that category. The back seat is just as spacious as the Tundra. IIRC, it's slightly larger. Feature wise, the F-150 blows the Tundra out of the water, simply no comparison. Engine wise, I like the sound of the V8 but man o man does the Ecoboost has gobs of tourque down low. I'm honestly not sure what engine would work best for my needs, but would probably lean towards the V8. If I was forced to decide today, I'd probably lean towards the F-150.