A contrast between what?
The United States is not Israel or Saudi Arabia or Spain, or the United Arab Emirates.
Our states like Texas and Florida, and California use and build desalination at the rate that fits them.
For instance the Santa Barbara plant was only useful for one year after being built in 1991, and now it is useful again, and among other projects is the Carlsbad plant, which will be the largest in the Western Hemisphere when it comes into service next year.
California has a lot of desalination projects in the works.
Good!
And they'll all come on line right about the time the draught ends.