Coming back to this to correct myself. I became curious after the initial question was asked,so I emailed Marcel. I assumed I had the F Bass strings installed (I was told that they were going to be on the bass)by default, but never looked closely. In fact, DR High Beams were actually installed. Here’s what Marcel said :
“
Re: exposed-core strings, this is true to a degree…
The relative low tension and composition of the exposed-cores can produce a slight “chorus” effect when playing in the upper register. These overtones occur more so as you play higher up, as you bring the strings closer to the pickups that magnetic pull can affect the tone. At factory set up it’s very minimal but does offer those strings a slightly unique tone players either tend to love or not love. I believe some of those who don’t love the tone/performance either have extremely discerning ears or may not have the set up dialled in.
That being said, for the Deluxe BN series we opt for full-core strings as those pickups pull even harder than the standard BN series pickups. The bigger issue there is that we aren’t able to set up with low/medium action without introducing fret buzz. The exposed-cores aren't compatible/suggested for the Deluxe. Our favourite full cores for the Deluxes and VF’s are DR’s (High Beam, Fat Beam, Lo-Rider) and Labella’s (RX series).
Hope this helps add clarity to the string situation. ”
Hopefully this will add some clarity moving forward