Not sure if anyone has done this either.
I will say that the exhaust is different between SRT and nonSRT Crossfires. In n/a Crossfires, the system is dual from the headers to the heat shield ~ underneath the seats. Then it goes to single pipe to the muffler.
In SRT Crossfires, the system is dual from the headers past the heat shield to the AMG resonator. Leaving the resonator is one pipe to the muffler.

The mufflers are also different between the 2. The SRT6 muffler is made by Sebring, not sure if the regular Crossfire's is or not (someone can check the underside of their muffler to see what it is stamped). But the regular Crossfire muffler has 2 'c shaped' pipes on the back of the muffler where the SRT does not (there are underside pics in the gallery somewhere, I referenced/linked them in a thread - SRT6 Exhaust (or close to).

I have been on a few drives with non SRT Crossfires and the tone/sound is definitely different. I would say the tone on the SRT is deeper, but not a whole lot louder.