Not only quieter but less raspy and less ricey. When I was autocrossing I had a few people run up to the car to ask what it was and was was in it, I can see why now... they probably thought Nissan...
i started with a b13 sr20de bin, adjusted it for the n60 maf and sti injectors then dialed the kvalue in which i had to adjust quite a bit to get right.. i also had to play with the injection late...