I upgraded from my LX470 to LX570 primarily for the drivetrain to tow. Marked improvement would be an understatement. The 5.7L is dramatically more capable, whether in the Tundra or 200-series.
My LX470 has the same drivetrain as the GX470, albiet vehicle itself is about 1k lbs heavier. My parents own a GX470 also so I know the family of drivetrain and vehicles well. The 4.7L is good in its own right but I'd say its tops out at about 5k of trailer.
What hybrid camper are towing?
You'll see lots of power and stability improvements with the 200-series chassis. The Tundra has an advantage being incrementally lighter and longer, but probably not a strong discriminator for a hybrid. Agility of the 200-series (while having solid stability) is a huge advantage IMO for the places I visit. I think the biggest variable in the towing calculous (besides body style preference), is the availability of factory 38 gallon tank in the Tundra. Depending on your taste for modification, the 200-series has aftermarket aux tank options in 12.5, 24, or 40 gallon sizes.
Towing Airstream 23D that is about 5.5k lbs, or ~11.5k combined weight. 4.7L VVTI w/5-speed did the deed, but was tapped out for this load.
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Towing Airstream 27D at 8k lbs. ~15k combined weight. 5.7L still hauls this load with authority.
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