I'll say floor standers merely because bass drivers can interact heavily with suspended plywood floors commonly used in modern homes to the point of obscuring the rest, and bass drivers tend to be located lower down with floor standers specifically to enhance bass levels.
I've run the same setups both in my basement with thin padded carpet over concrete foundation and in various rooms the next level up with suspended plywood floors and similar flooring and the difference in the flooring is by far the biggest factor that makes the same speakers sound way different.
Monitors on stands are not fully immune either but perhaps less susceptible overall.
The solution I have applied with success is to place speakers on isolating stands or platforms which greatly cleans things up. See my system pics for examples.
I've run the same setups both in my basement with thin padded carpet over concrete foundation and in various rooms the next level up with suspended plywood floors and similar flooring and the difference in the flooring is by far the biggest factor that makes the same speakers sound way different.
Monitors on stands are not fully immune either but perhaps less susceptible overall.
The solution I have applied with success is to place speakers on isolating stands or platforms which greatly cleans things up. See my system pics for examples.