CT differences in blu ray versions?

I'm thinking about getting the OT on blu ray, but I'm not sure which version to get. I heard that the blu ray version of the OT is slightly different from the SE....is that right?

What's the difference between these? Do they all have the same version of the OT and just different extras?

Just trying to keep my SW media collection under control, since I have multiple VHS and DVD copies already. Would like to have some self control and just get one blu ray version.

blu ray & DVD

Complete Saga

Steelbook (yes, I know this is just linked to ANH)

 

You can read the changes to the film found in 2011, which is slightly different from 2004 and 1997.

http://www.dvdactive.com/editorial/articles/star-wars-the-changes-part-one.html

https://en.wikipedia.org/wiki/List_of_changes_in_Star_Wars_re-releases

The Blu-Ray content is the same in 2011 as it is last year. Lucas is no longer making changes and Lucasfilm and Disney aren't interested in doing anymore changes. Bonus features are the same.