I'm in Cowtown, so can't help with an in-person test, but I can empathize with you: I was in the same position earlier this year, and even traded a few emails with each of the vendors to get clarity on a few points. Both are nice guys who are dedicated to the NSX and us owners. In the end I went with the Pride V2 (and Pride resonated test pipes), but that doesn't mean it was an easy choice- there is so much positive feedback, videos, etc. on both the AP-X and V2, it's like information overload!!
I took a risk and bought without hearing either setup in person, but definitely wanted the higher-pitch sound that the V2 put out. Since this is my first exhaust & first major modification to my NSX, the relatively lower price point of the V2 was easier to cope with financially. My risk has paid off, I am VERY happy with the sound of my car now- it finally has the sound to match it's looks!
I'm sure you would be happy with either of these exhausts over your OEM one- but if you want to be 100% sure, try to hear them in person if possible so you can decide which one is precisely what you are looking for. Those videos can't replicate the full sound & feel of an awesome exhaust from the driver's seat of your NSX.
Take care, and good luck!
Fuji