In the Acknowledgement of A Love Supreme, this motif seems to be two stacked 1 b3 4 triads—what would you call them? Super-diminished?? Or is there a better way to understand this motif chordally than two stacked triads? Thanks!
There is no such thing as "super-diminished triad". There are 4 types of triads: minor, major, diminished and augmented. Neither C-Eb-F, nor F-Ab-Bb is a triad.
The chord in measure 63 is Fm7add11, containing all notes of F minor pentatonic scale. The saxophone motifs use the same scale. The first one, C-Eb-F, is 5-b7-1, it emphasizes the root of the chord. The second, F-Ab-Bb is 1-b3-4, it emphasizes the 4, which fits the modal jazz style, as opposed to tonal music, where emphasizing 4 is normally avoided.