Richard Neutra was a draftsman for Frank Lloyd Wright at Taliesin East.
He went on to be Wright’s contemporary and rival in the Modernist movement.
That rivalry had to be exacerbated when Edgar Kaufmann, for whom Wright had designed and built Fallingwater, chose Neutra to design his winter house in the desert Southwest.
Here’s a good article from when the house was up for auction a few years back that goes into detail about it.
I prefer Fallingwater — but I’m definitely a woods guy, not a desert guy.