Wash and Wear Button Speculation
I am going to speculate that the wash and wear button gives a speed variation between the two for a single cycle : Regular and Gentle being constant for both the wash and spin cycles, when those buttons are chosen. If you choose Regular, you get regular wash and spin, if you choose Gentle, you get gentle wash and spin. If you choose Wash and Wear, you get regular wash and gentle spin, so wrinkles would "not set" Sort of a 2 and 1/2 speed machine, I think. The term "wash and wear" seemed to predate "permanent press" fabric matic.