In the history of all fuse threads, and correct me if I am wrong, there has never been a straight answer regarding how the special audiophile fuses work from a manufacturer (spell check roxy54) or retailer.
Among those answers by users, as interpreted by myself:
A billion volts are shot through the fuse wire before assembly.
A thicker fuse wire is used.
A much higher quality (better conductivity) fuse wire is used.
Somehow graphene enters the picture.
A liquid or other dampener is used in the fuse to prevent fuse wire from vibrating.
More conductive fuse end caps.
Can’t remember any others.
It is not disputed that they certainly have gained favor by users.