With a Rc value in the mid 50s, a couple points is noticeable if you are paying attention.
Not sure how noticeable a point or two will be in the low/mid 60s with this or any steel that
can be treated up to the mid 60s.
With 154 steel, I noticed a little difference when going from 59 to 61----I think.
Sometimes your mind takes over and your perception is jaded.
In field use, IF I did not know which blade was at which Rc, I might not be able to get it right more than 50% of the time.
In my opinion/experience the "differences" touted in the many variations of steel chemistry/performance are only readily
noticeable with lab equipment and not so obvious in field use.
But hey...........There are a lot of companies that make "Kleenex" and without the label who would know which?????
Tim