PPA is very durable because it has a large mono core (actally 3 cores bound together) like a syngut, but the mono core is surrounded by filaments. It's 50/50 mono/multi, just like it's predecessor Prince Syngut Multifilament.
Prince Premiere LT is 100% thin filaments, which makes it a true 100% multi. This is why I love PPA as a cross, but hate it in a full job, just as I love Nvy in a cross, but hate it in a full setup.
I still need to try PPA as a cross but I just bought 2 more sets of white Thunder Blast because none of my other favorite multis perform as well with B5E mains.