The idea which slurry from 8k will get smaller(by using it) and will act differently then original slurry is wrong . Doesn't matter 45 k or 9k .i just put 45 k example .
Now when you use your norton 8 k have you ever seen slurry formation? you see just black metal particles on surface of the 8k right?
if you want to make slurry off the 8 k you have to use dmt make slurry?
Your blade most like will never produce slurry off 8k.
hope this helps.

"Second, When you sharpen the blade on the N8K with slurry, it will not act the same way because the slurry will be constantly refreshed with 8K grits from the stone."
This process never happens my friend