All hormones have derivatives that have different binding capabilities to x receptor. To think there are not different levels of suppression goes against the rules of the system to begin with.
For instance 25 hydroxy vitamin d makes a derivative called 1,25 di-hydroxyvitamin
The latter has 1,000 times more affinity to the receptor. So its not just about the formers absolute levels, its about the levels of the latter as well. This is as simple as I can put it. I believe there are derivatives we are unaware of, the system is so complex we barely scratch the surface. This is why experience trumps all.
The stuff I post has been learned through working with thousands of men with hypogonadism from one reason or another including ASIH. That, clinical literature and tons of research on the boards. So when I answer a question I am drawing from all categories, trying to get that across to you in a single thread would not only be extremely time consuming it would be nearly impossible.
Not to mention I have over 10k posts over the last seven years, these discussion have been had numerous times. The info is there, finding it is not something I am interested in doing though. I highly recommend you do though, it may change your life, changed mine.