In my case i have both, mbrp on now, and when my new heads are done being ported and polished i will take the car in for my n/a build. That is when i switch over from mbrp to american racing headers complete exhaust. All my parts are at my tuners shop waiting for the heads to get done!
Biased opinion because I haven't owned any other but I love the S type catback on my car. I heard the Corsa Extreme in person, TOO loud for my taste but would be a nice track exhaust.