Yes, the cam-"profile" is controlled electronically ... thats what I was referring to ... and, I stand by my statement that the 325i-version has a Single-Stage Intake Manifold (vs. the three-stage in the 330i-version).
Also, for all, here is one of the better articles on the production process of the N52 engine ... go to the paragraph that beings with: "Start with the engine ...":
http://www.autoweek.com/article.cms?articleId=101850