Well, if they fit the holes, what problems could there be? These stands even have an angle adjustment screw, so you won't have them shouting at the ceiling even if the S75 stands are somewhat higher.
Last winter I bought a pair of white S80.2's along with the stands. When I took a better look, I noticed the previous owner had made new screw holes in the rear of the speakers, 10 cm higher than the original. So the speakers stood that much closer to the floor. The guy was an architect, and I have to agree that the speakers looked better that way! Fortunately the work was very neat (with even some black, hard adhesive plastic covering the unused pair of screw holes) so I could restore the original stance. I have a personal problem with everything unoriginal