Both are returned to PS.
But, a casino usually gets 2 or 3 of each. Casino's can run off how many they want.

Salesmen call the ones they bring "waxed" copies.
Salesmen no longer deliver art. Its all done through email these days.

I sold several 100 Chipco "Waxed" copies on the BB last year for $5 each. Still have a couple 100. Many of them were FQ's. Many of them showed the progression of the art work with several changes. Some were signed by casino executives.
I had the entire progression of "Waxed" art for Arizona Charlies East. Must have been a dozen changes. Its kind of neat to have art for the progression of chips.

In 1995-96 and some thereafter I got Waxed copies of almost all PS art. They are in storage. B&G put a stop to that stuff.