When EP released the "Sabre" plants (tc) the vendor I got them from believed there were four varieties. At the time, EP would not disclose the parentage. Later, they described N. xSabre as the grex namei N. vetricosa x xtrusmadiensis, on Sam's grex registry. The original release of N. ventricosa x xtrusmadiensis seedlings mean a much greater number of individual clones out there. When EP listed cuttings of Sabre (a), (b), & (c), I wondered if they were from the original seedlings or the tc plants. I don't know if that was ever revealed.
Your plant could well be the same as one of mine. As you know, environment affects color, plus ambient light makes a big difference as well. The first two plants were photographed out of doors, and the rather harsh sunlight gives the colors a "washed out" appearance.
Just for fun, I dug out one of my old photos of one of the
N. ventricosa x TM seedlings:
Cheers,
KPG