I have the same experience with my budget Focal Electra Be's i.e. I listened to both my 1038 Floor Standers alongside my 1008 book shelf / stand mount speakers. Both connected to exactly same system in the same room etc. The 1038's were by far superior across the complete sound frequency spectrum which is expected as the 1008 only has a tweeter and a combined midrange & bass drivers, the 1038 has a tweeter, two midrange drivers and one bass driver. The specs also show that the 1038 has a far larger frequency range which I could clearly hear.I do not know the model number but Borresson has a bookshelf speaker for $100K. I just can't see myself buying something like that unless I had stupid money. I do not care how good it sounds.
I am debating whether to keep the speakers that are pictured left. I love them. They sound great and are medium size speakers that fill a 30' x 45' room. So, why am I flying to California later this month to hear the Aries Cerat Aurora speakers??? My wife is ready to kill me and they are priced well over $100k. That is not Chump Change for me either.
Does size matter? Hmmm, let me ask my wife. I had Wilson Audio Duette 2's in a very large room and while they were great, I did go to a larger Sonus Faber Amati Tradition Homage speaker. Size did matter in my case!
So as well as physical size of the depth of the cabinets (for good low frequency sound) the height and width of the cabinets is also important in order to cater for more drivers etc.