The problem with a wooden floor is resonance and isolation. With a floor stander the speaker is in contact with the floor until you isolate it .. with a stand mount the stand is on the floor and the speaker is on the stand and so it is easier to apply isolation (also the fact of having a stand reduces the speaker resonance into the floor). Wooden floors are just a pain in the bum (suspended wooden floors) and as I have quoted in the past a customer of mine many years ago cut a hole in the floor and built up a brick base from the ground for his speakers and his hifi rack to isolate them from the floor.Illogical argument! If suspended floors are "unsuitable" for floorstanders, there are equally unsuitable for stand mounts on a stand. Get the interface between the floor and the speaker sorted (maybe by using a stone slab) and then go for a suitable speaker type - almost invariably a floorstander will be the better choice sound-wise, and they always look better.
As to the preference of floor stander over stand mount, I prefer the former as usually the footprint taken up by a stand mount is not a lot different to a floorstander.