With what they've done to change the Sequoia with solid rear axle, adjusting the dimensions to where they're almost identical, ~5cm bigger on Sequoia, but I think much of that could be attributed to US specs and body cladding; I simply find it hard to believe that they would import an almost identical vehicle from overseas when they're producing one right here on shore (Texas) where they can save the import costs. The Sequoia is already slated to have the same twin-turbo V6 as the LX, whereas the LC has the V6 twin-turbo diesel.
Sequoia pricing brings it more in line with the domestic competition (Yukon/Tahoe/Expadition/Navigator). Don't get me wrong, I'm not saying the Sequoia and TLC are equals, but people on this forum are in the minority of the potential customer base.
Similar logic applies to the 200 series LX vs LC. Not equals, but not that different - except sales and import numbers for the LX far exceeded LC's, which is also part of the difference in the pricing of pre-owned. Supply/demand.