Ah, I see. Some people may be referring to "smooth" as vibration. I was thinking "smooth" in terms of power delivery, or more accurately how well it translates the movement of your foot to torque at the wheels. Which, as you say, is great for daily driveability as well as off-roading.
I have a new LC and also a Tundra with the same engine/transmission as the GX. Power-wise, there's no contest - the twin-turbo V6 is a beast, and the two extra gears make a difference too. But "smoother"? Hands down the LC with the hybrid is much, much nicer to drive. Of course the GX may have...