2012 Boss302 vs 2012 GT500 LOUDNESS?

Ok what i want to know is which one is louder? cause i have 50k to spend i want to know which car is louder cause iv read up on everything i know the car very well ill buy either one so now whatever is louder is the one im gonna buy cause both cars are just awesome so its down the the sound. Im planning on hooking it up with BORLA Exhaust so can anyone tell me which one is louder Stock?