I did A/B these HOWEVER I basically nullified my comparison as I only listened with CX original DUMMER cable, vs the stealth on the VIVO.
that said I know CX inside and out daily driver for 9 months, the Stealth is what I consider CX ELITE. Literally everything I loved about the cX was stepped up in the stealth, but the huge things are soundstage doubling, the experience of instruments seemingly directly behind others, nuance of decay and vocals are buttery not as shrill/digitized. CX wasn’t bad at any of this stuff, but the stealth just showed me what was possible.
comparatively the Stealth does away with all of the “brittleness” in how razor sharp the CX is, and adds presence “weight” across the board and does all the bass wonderfulness that I had to EQ in to the CX.
sold my CX a week after Stealths arrived.