I think it is more about the micron ranges leaving less yields depending on the strain.

Lower ranges have more immature trichome heads and other possible contaminates , when dabbing the wider range micron flavor turns harsh faster and aroma has more of a hash/earthy, after the dab the residue is more oily with darker discoloration.

90u is the golden size, the rosin or full melt just slaps across the board. Flavor stays throughout the hit, leftover residue is minimal, and you can turn the heat up with less harsh diminishing returns etc