I've towed my Comp with three different vehicles with three different drivetrain packages. I've towed it locally with an RX350, locally and long distance with a GX470 and now my Denali. I mention this because the drivetrain package of the GX470 is going to be very near to the drivetrain package in the Tundra. I also hope Mapleleaf chimes in because he has a 5.7L Tundra now and he also has a 4.7L Sequoia that he tows his Conbrio with. The 4.7 liter will handle it just fine but it really can be a turd when it comes to acceleration and maintaining speed up even the slightest hills at highway speeds compared to anything with a larger engine. I actually get better gas mileage towing now with my Denali which has the 6.0L engine in it that I did with the GX. My vote would be the Titan for the greater displacement.
'86 Comp TS6M - Reborn 2016
Riding a HO Sports CX Ski