Loved Dusty to bits, burt there's really no comparison.
If you'd compared her to Baby Washington, Jean Wells or an Irma Thomas I might have understood the question (though the results would not necessarily favour Dusty).
Smokey was one of the worlds first 'true' Soul singers and he's delivered the Soul goods for well over 30 years.
His "Who's Gonna Take The Blame" turned me onto the deeper side of Soul and some 36 years later I still use that record as a benchmark for pure class, because of its sheer, wistful, beauty.
As Steve said "The Love I Saw In You Was Just A Mirage" is pure artistry. Also, who can failed to be moved by "Ooh Baby Baby".
Sorry, but Smokey is the most Soulful of the two by a country mile, but I'm with you all the way on the Womack reference. Bobby W is very much in a class of his own.
Sean Hampsey