FI vs Stilen~~ need advises~

[niznizbobo]

hello everyone, i m new here and new to mod cars, i m looking for the CBE at the moment and i m comparing between FI and the Stillen,can anyone tell me which one is louder when cruising, i think FI is more louder through the video clips~i like both ones,just hard to decide~i like the shape, the looking of the FI CBE with CF muffler,looks so sexy, but just worry it is too low to the ground and is too loud inside the car,i dont wana make my gf headache~haha~,thank u soo much guys,plz giv me some advises,and also one more question,wat is the different between 12 resonators and 18 resonators? sorry about been a noob~plz help~ looking for your replys~