Again, that doesn't account for what can be done, and heard, as a result of tweakingChanging fuses is not tweaking, which real tweaks are measurable one way or another, it’s snake oil nothing more nothing less.
The only reason a fuse can be better as said before, is if it’s seen too many turn on surge cycles (below), then it behaves a bit like a light globes filaments.
It bends too many times because of the turn on surges, hardens, then carbons up.
Have you ever noticed how bright a new globe seems compared to the one that just blew even though they’re the same wattage, and they always blow at turn on, because of the turn on surge.
A slow-blo fuse "ageing" right to left
https://peakpinball.com/wp-content/uploads/2013/01/fuse-8312-640x426.jpg
A fast-blo fuse "ageing" left to right
https://i.stack.imgur.com/0uqWX.jpg%20
Cheers George
Cheers George