Xpost brakes , Anybody use Saint rotors with Gustavs?

I want a new rearhub, the old XTs slowly dying , so I was thinking of getting A Saint hub with Saint mech and a Saint 160mm saint rotor to replace the XT with 160mm Gustav rotor . Has anybody tried Gus brake with Saint rotor ?? The brake surface is different , but then again the new gustavs come with wavey rotors ?? ....
txs Cheers