https://ospreypublishing.com/peter-antill
He is the author of one. I checked his credentials and what not. I always do. It's how to write a good paper. Just the face of it is irrelevant. Gotta dig.
Martin Waligorski
He is a contributor to many historical journals and magazines, as well as the awards his site (the one I referenced). So third party, maybe, but not from any John Doe, these are credentialed men in the field.
This is like telling James McPherson when his gives you a fact about the US War of Rebellion that he has to source his facts or you don't believe him...
McPherson is a popular historian. He, and others like him, should be the ones whose sources are critiqued most heavily. Just because I want to, David McCullough sucks too! Just because he was the head of the AHA doesn't make him an incredible student of history. This is quite off topic, but this is also venturing down my street lol. I am not a popular historian nor do I believe that they deserve Pulitzer Prizes. But, subjectivity aside, this is why I said what I did.
WW2 Weapons site. I looked for an authorship citation, I did not find one. So I checked front page and found this: "All information, data and statistics used in the Web WW2 Weapons had been compiled from a variety of sources and the large, over decades collected, library of the author about military history, WW2 and weapons. Because of those many, unfortunately the additional effort to specify each individual references is too hugh. But this are the savest and most reliable information, which are also constantly updated and improved to the best of knowledge and belief." This disclaimer is alarming to say the least in terms of scholarship.
I can't really fault you for historyofwar.org, it is a great place to start any form of research. However, it is tertiary (sometimes not even scholarly) and only provides a basic foundation of knowledge; not unlike Wikipedia for middle school students.
I have read some of Waligorski's stuff on plastic model sites, history forums, etc. While his works are indeed tertiary on the Spitfire site, I give him more credibility than the other two. It would have been nice if he had cited some sources himself, but oh well. He does use a primary source, but not to prove anything useful in this debate about Spit IX and Spit VIII.
This was fun, I am sorry if I ruffled any feathers. That certainly was not the objective.
I really see no need in adding two Spitfires. We have C.202's and Ju 88's compared to B-26's/B-25's and P-40F's. There is no large advantage for the Axis that justifies adding 2 more of arguably the best plane in the setup. I will also add that if 6 Spit VIII's or 8 Spit IX's was an option, I would have chosen 6 Spit VIII's. The difference in performance and the advantage is negligible, until you add 2 more.
Cheers,