Cliff Stamp did a video I thought was interesting (don't know how to link video): It's on Youtube: The title:
Edge Retention - 3Cr13/420, VG-10, k390, CPM-M4 (cardboard)
Despite all his care, there was no noticeable difference between M4, VG-10 and K390!!!: They hovered around each other... Even for the "mystery steel" 3Cr13/420, he called the evidence that the other 3 steels were superior to it visible but "weak": Barely noticeable after each knife was brought down to a certain percentage of optimal sharpness, and re-sharpened ten times...
The numbers for the amount of material to cut needed to bring out the differences between the 3 "better" steels he described as enormous: 50 000 meters of cardboard, just because the cardboard is so inconsistent...
He mentions that in CATRA results the difference between VG-10 and M4 is less than two to one, while the differences in similar cardboard alone is TEN to one...
Which is why it is so difficult to tell edges apart in real life...
He of course mentions "cognitive bias" at the end... No kidding...
Gaston
Edge Retention - 3Cr13/420, VG-10, k390, CPM-M4 (cardboard)
Despite all his care, there was no noticeable difference between M4, VG-10 and K390!!!: They hovered around each other... Even for the "mystery steel" 3Cr13/420, he called the evidence that the other 3 steels were superior to it visible but "weak": Barely noticeable after each knife was brought down to a certain percentage of optimal sharpness, and re-sharpened ten times...
The numbers for the amount of material to cut needed to bring out the differences between the 3 "better" steels he described as enormous: 50 000 meters of cardboard, just because the cardboard is so inconsistent...
He mentions that in CATRA results the difference between VG-10 and M4 is less than two to one, while the differences in similar cardboard alone is TEN to one...
Which is why it is so difficult to tell edges apart in real life...
He of course mentions "cognitive bias" at the end... No kidding...
Gaston