5150 (which I also have) sounds more compressed. The Pinnacle sounds more open and brighter. I myself am trying to determine if I'm happy with the 5150 or if I want to give the Pinnacle a shot. My amp is very bright, so the 5150 being a bit darker and more compressed actually works in my favor. Things might get too harsh if the Pinnacle is brighter.
See that's the thing you have to find gear that is matched, what works for one amp or cab will not for another. years ago in a interview with GP eddie said he purposely used things that matched up and i know exactly what he meant.
