It was started by Oregonpapa about the Synergistic Red fuses and it contains many opinions and listening impressions of this and other fuses.
You may find it quite helpful.
YES!!! They do make sonic enhancements. To what degree, depends on your gear. I have been using HIFI Tuning fuses for over 5 years in my rig and recently installed a Supreme series fuse in my Modwright DAC. I wouldn't say that difference is day and night but what you hear is nothing short of 'amazing'.
Whatever brand you pick, you will hear improvements over a stock fuse.
Yes wrong forum for this sort of question.
It's like asking that someone can give a "tech-talk" to why do Shun Mook (B. Mpingo Disc Room Acoustic Treatment Devices) make a difference. ( I swear there was a difference when I blutac'ed one to my forehead when I listened)