I dunno man, theres something in that sound that I am not able to put my finger on. Almost like, the resonance is higher pitched/tingy and louder than what I get with the PV1 (only exp I have since I dont have or never heard the PV2). Doesn't sound as deep throated and sounds like its pushing higher db.
Maybe its the video though. Never trust what you cant see in person, heh.
And wow.... that thing is big! Its like a melon cannon. At least its undercarriage and not something that likes that poke its turtle head out of the rear. 
PS- looks like a giant C02 cart from an air rifle.
Gary Noonan
'01 S/C VX / '18 Forester XT