Short video I made for anyone on the fence about which motor to get. I had an '09 six speed, sold it and bought the '07. The 4.0 has lots of torque everywhere so it could easily be driven an entire fuel tank without seeing 2500 rpm. With the 2.7, literally just about all the torque is above 3000 rpm but there's more up there than you'd think; it just needs to be revved up to get it.
Both trucks are access cab, 4x4, manual transmission, and have 245/75R16 tires.