@HumbleHomeCook maybe average micron seeing as the abrasives are not always homogenous? Curious if more homogenous = tighter scratch pattern and less contrast (dependent on hardness of abrasive)? Thinking about those SG vs. SP patterns!
I would think that the more uniform the particle size, the more uniform the scratch pattern would be. But you might also need that spread for efficient cutting and surface refreshment.
Abrasives are actually a pretty involved discipline.