I use cat whiskers myself. I love the look of fur, but I'm going to use what works best for me. I haven't tried the Hush Puppy silencers yet, so I can't compare how they work.
Lots of things will affect string noise--string material, number of strands, how it's made, silencer material, silencer placement, even whether or not the string is shot in.
The amount/weight of the silencer material will also affect speed, which in turn can affect arrow flight if you are borderline on spine.
Chad