I really don't know what is the reason.
when i sharpen blade i usually try to get best out of steel.
i have notes lets say my last red imperial i honed on had very hard time finish on Any Japanese stones which i have.
As soon as i switch to escher work was done.
Now that razor is not something special (stainly steel,cast steel etc).
then i had couple more different makers same result.
we are talking only for last stage of honing last finishing strokes.
I get used to this already as soon as i cannot get what i want i switch the stones.
This makes my job a lot easier.
Sharpening part i have never notes any differences. lower grit stones just moves the steel .