I'm wondering if it's simply because the fast cutters are fast or if it has to do with the suction they impart to a blade as you use them. Wondering if it could also be too many circles when using slurry.

Coming off the Norton I wiped a less hard (Dovo hardness or so) blade off after 40 circles on my Oozuku w/ very light slurry & was shocked at how much swarf was present, even though it was hard to see much of a color change in the slurry!

Really interested in the properties behind this. That & it's kind of fun to debunk the idea that "naturals don't overhone".