I have no idea about this, sorry. My only real Bartolini experience dates from the early 90s when I got a set of Bartolini single coils in my 77 Fender JJ (back then those were not desirable at all :)).
To my ears the Bartos were rather subdued in the highs and had no clarity at all. I ended up putting the original Fender PUs back.
The Big Singles by Nordstrand keep that typical clarity in the treble region but are never harsh, not even in an ash/maple JJ bass.
Further they got a little push in the low mids, making them absolutely perfect for pick use as well.