I have an 09 F150 that I like quite a bit, but I had to rent a truck last week when I was doing some stuff on my land in Montana and they gave me a new Tundra. It was a pretty basic version of the Tundra and had the smaller V8 (I think 4.6), 4x4. I spent a lot of time either off road or hauling stuff from Helena to my cabin in the woods about 65 miles from Helena.
This is obviously very unscientific, but a few things about the Tundra stood out compared to my F150.
On the positive side, the ride on road was much smoother and it was plenty capable off road.
On the negative side, that 4.6 engine was not up to the job. It felt gutless on the highway, even unloaded, and got horrible mileage (worse than my F150). Something like 14 mpg overall. For a new vehicle (it had only 4000 miles on it) it was already starting to show quality issues-the rear doors would unlock randomly, the backup camera didn't always work when the truck was put in reverse and the seats felt like they had no padding.
It wasn't a bad truck at all, but if you're going Tundra I think the 4.6 is a bad move. Everything I've heard about the 5.7 engine makes it sound like you don't take a MPG hit by going with the bigger engine but you get much better power.
