You sound like you know more about it then I do so take what I say next as my opinion. I have not read either book I just read the threads around here and it doesn't sound like a lot of people count calories while doing a IF diet. Leangains might have more calorie counters but I see no reason to count them on the Warrior diet.
I tried a IF diet for 7 days and lost 3 pounds. My eating window was 4 hours post work out and I was shoveling down food not counting calories. After the first week I stretched out my eating window into 6-8 hours depending on my schedule and have managed to maintain my weight.(which was my goal)
You can tell me if what I am doing even fits one of the mentioned diets. Again, not an expert.