I have listened to episodes of The History of the Great War and The Great War Podcast. Personally, I think Carlin my execute a podcast better than anyone I have heard, so neither are on his level in terms of insight, presentation, production, etc. However, as you noted both go into more detail and cover more aspects (sounds weird given Carlin did what, 15-20 hours on it)! I like "History" a little better, but both are good. I have enjoyed a lot of the "History" episodes post-Armistice that go into the players, dynamics, and impact of Versailles. IIRC, "History" focuses more on the long-term impact of the War, which I enjoy. The dynamics between Wilson, Clemenceau, and Lloyd George at Versailles is interesting ... I loved the Lloyd George bon mat that he was sitting between "Jesus Christ and Napoleon." Clemenceau on Wilson: "Fourteen Points? The Good Lord had only ten." ... or some such as I probably mangled them from memory.