So.. safe to assume this is the new direction for the next round of Prince silo updates. Twaron out. Zylon in. Interesting material decision. Here's an except from Alpha Ropes on some material differences:
ARAMID - KEVLAR®/TWARON®/TECHNORA®/NOMEX® Aramid fiber with high modulus and high heat resistance. It is sensitive to UV light but it gives an extra protection and smoothness in high loads and heat situations.
PBO - ZYLON® PBO fiber, whose commercial name is Zylon®, manufactured by Toyobo Co., outstands for superior tenacity and modulus against aramid fibers and for a remarkable stability under constant load, which makes it suitable to replace steel. Easily recognizable by its distinctive gold color, this fiber is featured by a great abrasion resistance and excellent heat-resistance, withstanding much higher temperatures than aramid fibres. PBO Zylon® is however very sensitive to UV light and moisture. Caution is required for applications involving flex fatigue.
So basically, Prince is exchanging some meaty thuddy-ness for crispy solidness. Perhaps understandable in the Phantoms, which are woefully low on power-to-spec, for modern singles anyways. Will be interesting to see how it plays out in the Tours. Also interesting is how Zylon is more susceptible to flex fatigue... We've seen how certain layup decisions can effect structural integrity (Yonex's issue with Percepts cracking at the base of the neck, probably due to the Servo Filter layer weakening the layup too much in that area; previous VCP layup in identical mold was perfectly fine).