I have Evo2/HS-2/PAF Pro on my RG. I simply love it!!!
First of all, forget all craps like "JP tone", the "SV tone", the "JS tone"...
Remember: YOU WILL NOT SOUND LIKE JP, SV OR JS EVEN IF YOU PLAY HIS ENTIRE RIG!!!
I have the Air Norton/Tone Zone in my J-Custom. The Air Norton is warmer/fatter than the PAF Pro, which has a bit more harmonic overtones.
If you want your neck tone to be a bit "treblier" (cuts better through mix and heavy processing), go with the PAF Pro.
If you want it a bit fatter, go with the Air Norton.
Also, I find the PAF Pro to be more dynamic and articulate then the Air Norton.
Personally, I'd have a hard time chosing between both... You'll have great tone with either choice!
However, I went first for the PAF Pro and then only for the Air Norton. I guess PAF Pro can be more versatile.