Rush vs. HD Slip-ons?
 

I was considering the Rush slip-on mufflers with a 2" baffle for my '08. My question is: Does anyone know how they sound in relation to the 49-state Harley Davidson mufflers for the 04-05 Sporty's? My brother's '05 has the HD mufflers and it sounds pretty good- decent tone and volume. I was wondering if the Rush have similar tone and volume or are they significantly louder?