imo, sound is what your paying for. It's truly unique when using a chambered muffler. It's also quieter than stock under 2K RPMS, but after that it screams. O/R Prochambers PC-9900 are on backorder everywhere except CA. Ohio expects stock this friday. I'm going the o/r prochamber route.
Your only talking a few horses one config to another. If loud is all your after and want to wake the dead, get an o/r X and SLP LM2 catback imo. I can hear this setup miles away coming down the country road.