I think it would depend a lot on the design and quality of the stand you are using.
If the centre of gravity is near the bottom of the stands then it shouldn't "wobble". Then adding isolation to the stand would be the best option.
Over or under? - Standmount isolation
On a bare suspended hardwood floor, is it better to place isolation under the stand or between the speaker and stand?
It would seem that under the stand would allow more wobbling.
It also seems like under the stand is more common for isolation.
I know the best way is to try both. Which I will probably end up doing unless there are good reasons for one vs the other.
Also, it looks like under the stand isolation options tend to be more expensive.
Speakers are small. LS50s and Rogers LS3/5As
Stands are 28" tall.