Please note that the graph in this thread is only a draft for the sake of presenting an idea.
I have put almost no thought in the actual data that's currently in the graph.

If I were to draw a final version, based only on my own experiences, it would surely look different that this example. The current version is only a rough and quick estimation.

About the DMT"s. They are the flat and solid equivalent of (diamond) sandpaper. In the beginning they cut very aggressive, even after they're broken in, but as time goes by, they do become significantly smoother and also a little slower, just like any sandpaper would. Unlike almost all other hones, which release fresh particles, the DMT's have to abrade the steel with the same honing particles during their entire life-cycle. Once those diamonds are smoothed by use, they stay on that performance level a very long time. There's almost no way to reflect that in any chart or graph. For a short while, I have used a DMT-EE (8K), in new condition. Mine maxed out at a less keen level than the Belgian Blue. After I sold it, but held on to my other DMT's, I noticed that my DMT-E (1200) over time expanded its claim on sharpness significantly. I guess the DMT-EE would have done the same.

Bart.