The w4s has a very SS sound to my ears, a sort of steely tone, maybe Tantalum or Carbon would have been a good choice for resistor,? give it a nice color.
Tweaking is about balancing
But to be fair I never used the Vishays so I should not comment, I have heard people who have used them say thay are very transparent. If you need transparency than that is your ticket, but sometimes you need something different than the best or most expensive...just my 2 cents.
Also if you do not need too many resistors buy a few different kinds, they are pretty cheap,(except for the nude Vishays). I bought three different kinds of resistors for my cd player to see what I likebest in my system, if you are handy with a soldering iron, or have a friend who is handy with a soldering iron, then the audio world of tweaks is your oyster!!~! enjoy!!
And yes the blackgates can be a bitch....give them a year is how I look at those sort of things
BTW, I am a tube guy, so understand my biases. I have heard some very bad sounding tube gear, and some very good sounding SS gear.
Mike