whatever you can say of this, is what you can say to its 89X sibling, which is (from both design and construction perspective) the exact same pickup, but turned 180 degrees to have the "single-coil" setting place the vertically-stacked bobbins placed as close to the end of neck, hence "r"everted.
but, in this design concept, there's room for a little more experimental survey: i've swapped the two siblings, so that now the "single" coil isn't the closer to neck and the closer to bridge, but the other way around... it makes the bridge pickup a tad softer in tone, and the neck pickup a tad more discreet in its mid-low frequently range... it's kind of an hommage to where MusicMan placed its single pickup on the now iconic Stingray bass, and similarly pointing to a smoother hue of tonal color.
the pair of 89X and 89XR now fits a small-bodied archtop guitar primarily meant for jazz style... all the traditional voicings are there, with this EMG pair, along with Fender-ized vintage staples immediately recognizable as Strat- and Tele-like.
what an elegant, and flexible, sonic cookbook you have, with these two!