"Maybe a different test with lighter weight would make some differences show up but apparently not with 150 grams."
I think you summed it up nicely Mr. Bud. Additionally, it is worth noting that slicing a 3" round potato with a sharp blade requires 3-5 POUNDS (1362g-2270g) of force. Testing for roll resistance with less than 150g would indeed be a curiosity and interesting but the resulting data set would have little real-world use applicability unless the goal was to slicing single sheets of paper, etc.
For me the key consideration is what does all this mean for real-world use of my knives. I'm sure that I couldn't really tell the difference in 10%-20% difference in roll resistance when slicing my evening's broccoli, zucchini, kohlrabi or even acorn squash.
I think you summed it up nicely Mr. Bud. Additionally, it is worth noting that slicing a 3" round potato with a sharp blade requires 3-5 POUNDS (1362g-2270g) of force. Testing for roll resistance with less than 150g would indeed be a curiosity and interesting but the resulting data set would have little real-world use applicability unless the goal was to slicing single sheets of paper, etc.
For me the key consideration is what does all this mean for real-world use of my knives. I'm sure that I couldn't really tell the difference in 10%-20% difference in roll resistance when slicing my evening's broccoli, zucchini, kohlrabi or even acorn squash.