Hello Andreas,
Did you mean the point of balance? I am unsure.
A broad sword is normally quite forward balanced, ~15-30% of the blade length.
The balance point of a saber, rapier and small sword is much closer to the hilt, ~5-15%.
This leads to a total different fencing technique.
There are some good videos on YouTube:
https://www.youtube.com/watch?v=6r7VWIQCHvM
(Rapier vs longsword Mike & Nick AHF Sparring)
I hope, this will help.
Regards Roland