Different Bourne BD?

[cnowels]

My wife and I were watching some of the extras on the Bourne Identity disc last night. I had already seen most of them due to my previous Bourne DVD, so I pulled up the review here on Blu-ray.com AND High Def Digest to determine which ones I hadn't seen before.

Something odd.....while the extras listed on both of these websites match each other, they do not match the extras on my BD.

Specifically, I was unable to find the HD trailer for Bourne Identity anywhere on my disk. And what is even stranger, my BD had 3 extras that were not mentioned in the reviews.

I believe they were called Ludlum: Identity, Ludlum: Supremacy, and Ludlum: Ultimatum. They had a lot of interviews with Robert Ludlum and his friends going back to the 70's. Very good 15-20 minute featurettes about Robert Ludlum, his books, and the adapting of them for the screen.

So what's the deal? Are there different versions of the the Bourne trilogy out there? Did blu-ray.com and HD Digest just review screeners that weren't the final retail versions? Does anyone else have this version of the BD?