The differences between the LC200 and the LX570 are the air suspension on the LX. Otherwise they are mechanically identical. Exterior looks, and interior features and options are different but mechanically they’re virtually the same except for suspension. The Lexus will be cheaper, and will be more likely to have had an easy life with dealer service as a luxury vehicle.
That said, I bought a 2016 LC used despite it being less of a value. I prefer the looks of the LC, and the interior.
I think you mean hydraulic suspension (lovingly known as AHC). Air suspension is for Rovers.