mac catback?bassani or x. should i reutrn it?

i justrecieved my mac ss catback and i already have the bassanni ss offroad x. I was just wanting opinions on if should return it. (still in box never used) and get an offroad H? i have heard mixed signals about which one to use. I was told the H sounds better with a mac catback but i also heard the offroad x sounds good with the mac. Anyone have any experiance running an offroad X with the mac and how did it sound?

thanks
jeff