I have had both on the lancer and honestly I like the type s alot better. I would say listen to sound clips of both recirculated and make your decision from there. Granted it will sound a bit different on different cars, but it will give you a general idea. Also I would say hold onto the type s bov either way. They are becoming harder and harder to find. If you do decide to get rid of it sell it outright, you will make more money that way. Ok now on to the sound clips.

Type S recirculated
http://www.youtube.com/watch?v=B6tEii4rSS8

Type RS recirculated
http://www.youtube.com/watch?v=1tGFT6CuwlQ

I would deffinately recommend switching over to the synchronic if you plan on running any kind of high boost. The greddy type rs is known to leak under high boost applications.

 

Or the APS dual vent