By ERIC WILLEMSEN Didier Defago of Switzerland won a World Cup downhill race for his second victory in eight days, while Bode Miller finished tied for fourth.Defago charged down the famed Streif course in 1 minute, 56.09 seconds Saturday to beat Michael Walchhofer of Austria by 0.17 seconds. He also won a World Cup downhill last Saturday.Klaus Kroell of Austria, who won Friday's super-G despite a broken right hand, was third.