In my opinion, the red set was the one and style that Sturgess wanted - read the disclaimer in the green set.
From what i understand and read in the Canadian produced book, the editor threw in lots of little comments to make it more readable, but I found it distracting. Also, the order of things seemed to jump around.
I like Sturgess and Gortz (remember this was originally an expanded PO8 book of Gortz IMHO) but there are issues I find wrong. Every book has errors or the way that person believes. These might sound like slams, but its the book I grab (via DVD) many times or if police, ours or Don's for markings, Mauser Parabellum for Mausers, and then Jan's books are good for filling in almost everything else.
a few comments on the red/green books
1. As usual Sturgess uses almost all his own guns he owned at the time - which I understand but can sway you a bit in conclusions.
2. He has some slightly inaccurate info on Simson's, but that is because he must not have looked at the book -
3. He really likes to focus on early prototypes, which is good, but I feel he puts in far too much time and chapters in it instead of further work on just basic PO8, LPO8, etc. Great for early info, but you have to dig for more basic information - but that is just my feeling.
Ed