my suggestion to you is to do reasearch on both u haven't done any real research from your posts, and going and askin us isn't helping you...

Snoopy; psi number dosen't mean anything cause a smaller turbo at 12 psi will not really even push the motor as say a bigger turbo at 12 psi its all about CFM's

Fira: my car is stock and i boost around 11 to 12 psi, and my car runs great, so like i said read up my good friend so YOU can make the best decision