I don't have my axe next to me at the office, but I *think* that the strings are tapers, right? My task is to find non-taper cores that act like the Sadowsky strings. I took my Fender to my luthier for a setup once with a pack of Fender tapered strings and he sent me to return them and get non tapered strings.
Something about setting up the frequency modulation in the warp core. Uh, at least, I *think* that's what he said...
FWIW - I've found DR Fat Beams to sound almost identical to Sadowsky strings... like splitting hairs.
There is a "feel" diference in that the Fat Beams are slightly lower tension FWIW - but sound, very close.