Ilford offers a chart of equivalencies to current and discontinued Agfa and Kodak materials. While not the kind of 'study' you are looking for, it's specific enough to go by when making choices. And, what I was pointing out is that film companies make data sheets for photographers to refer to about their own products. Beyond that, Noble, you've moved quite a way from making photographs to another discipline entirely. I prefer to make photographs. While you're doing 'science', you aren't.