If the end result of this kind of hair splitting were to project negatives on a screen, I'd see some point to the exercise. But, since I never do that, and print as skillfully as I can on paper with the negative I've produced, there is absolutely no point to this for me. If the film's speed and grain are adequate to the task, and if I've learned its characteristics from experience, I standardize on that film, developer, time and temperature, and always produce a negative I can print from. One's time, apart from making photographs, is far better spent looking at as many photographs and paintings as you can cram into your day, and figuring out why they're so good, than in anal analyses and comparisons of minutia unless they dramatically alter the way you work.