Is the 2024 Lexus RX 350 Just a Luxury Version of the Toyota Highlander?

Unbeknownst to many, the Highlander and the Lexus RX 350 have many similarities.  

Of the midsize SUVs available, the Toyota Highlander from 2024 is among the finest. 

Many, nevertheless, liken it to the Lexus RX 350. This is because the two cars have a similar appearance,   

but are there any other similarities? Fortunately, there are similarities between the 2023 Toyota Highlander and the retiring Lexus RX 350.

So, is the 2024 Toyota Highlander only a more upscale version of the RX?