sigh.
since you asked in a nice way I'll actually answer you.
The comparison threads turn into the biggest pissing contests between fanboys you'll ever see. Even if the brand they rep til death isnt in your choices they are going to try to shove it down your throat as the greatest thing ever. It gets out of hand when the DC fanboy throws punches at the AA fanboy who launches a sundown chair fanboy into the mix and the DD fanboy jumps off the top rope and lands a flying FI.
In all honesty there is no best. There is no better. as long as you are comparing product in the same category they are going to be real close to each other. One may be louder in this install than the other and then you could switch cars and the other would be louder.
In order to keep the peace we have disallowed them.