Several years ago Quatro used to wrap her body in skintight leather jump suits and arrive frantically onstage with her bass guitar, shouting overdrive rock from her native Detroit. This time around, the leather has given way to corduroy slacks and satiny blouses, and the raunch has softened to a smoothly crafted pop-rock. Stumblin’ In, her bouncy and melodic comeback hit, exemplifies the new Suzi. (Chris Norman of the group Smokie sings the duet with her on that cut.) Much of this album is in this restrained commercial vein. Wiser Than You nearly duplicates the rhythm and arrangement of Stumblin’. But there are traces of her Motor City roots when she cuts loose on Rick Derringer’s Rock and Roll Hoochie Koo, The Race Is On and Suicide, a slow, infectious rocker. This is a risky departure album balanced between pop and rock and brought off with a slick maturity.