As far as I know, the SIT Silencers use the standard nickel-plated steel for the wrap wire, while the PWs use Alloy 52 (nickel-iron), the latter being more magnetically active
That is correct sir. The PWs have a final wrap that is more magnetically active. I'm sure there must be some interaction between that and the PUs. Maybe that was the difference I was hearing initially. (a little more like flats, a bit more "thump" in low /lowmids) I'm not sure if that really has to do with the nickle- iron being "more magnetic" or that it's just different than nickle plated steel?? Or chrome plated or coated strings for that matter. All strings I'm sure have different characteristics with their own voice.
It will be an interesting comparison swapping them between an active bass and a passive one as to how these two sets would interact with different pickups
I'm not sure that would really make a difference magnetically , as the magnetic part of the interaction would be at the PUs, pre electronics. Or did I misunderstand? I'm really good at that.
I would also be interested in the longevity of these two sets in your experience. My expectation is the PWs have a longer useful life.
I can't say at this point, as this is my first time using either of these particular strings.