Question on Luger Book

[eagle7373]

I have been considering investing in the three-volume Gortz-Sturgess book on Lugers. Problem is, there are two versions of it, and try as I might, I cannot figure out of there is any substantive difference between them.

First, there is "Pistol Parabellum - History of the Luger System" published in April 2010, with 2014 pages in 3 volumes. This book is often available for around $230 or so.

Then, what I think may be the same book, was published by Brad Simpson in 2013 as "The Borchardt Luger and Automatic Pistols." The web site says this is 3 volumes, 1992 pages, 2 DVDs in a slip case. Price is $300 (or $950 if you want the deluxe version).

So clearly one difference is the 2 DVDs. But as for the printed book, it's not clear to me whether the contents are different (the different page count may just be a difference in how some pages, like index, etc., are counted).

Does anyone know for sure whether the Simpson version actually has updated information or is just the same book repackaged with a different title and cover? If I choose to buy the Simpson version for about $70 more, I'd just like to know if there's a difference.

Thanks very much for any help on this.