I think if you are talking about the same money the floor standing speakers will always sound better or at least project louder and provide more sound. As multiple folks have said it makes zero sense because the stands take up about the same floor space.
The only caveat is if you like to move things around. Moving bookshelf speakers is easy… moving a 125lb/ea speaker is another story. I love the looks of stand mounted speakers but I’m a dealer and like swapping and moving and testing stuff.
best and easiest pair of floor standing speakers I have ever had are Monitor Audio Silver 7G 500. They have 2 rear ports and one up high. So easy to reach your hand into that top port and move the speakers….
For me speakers must be functional, attractive and sound good.
I don’t care if you have the best sounding speakers (although debatable) if they are ugly I don’t want them. I listen with my eyes 👀 open….