1) The LaserWriter IIf and IIg don't use microfine toner, because they get
excellent results using the same size toner as before.
2) While they function differently, FinePrint and RET are both designed to
improve the quality of text and lines without affecting performance.
3) PhotoGrade is completely different from RET or microfine toner. RET
smooths text and lines. It doesn't improve images. Microfine toner
doesn't improve the resolution of images; it just has smaller average
toner particles. Since a single 300-dpi dot uses a number of particles,
smaller toner has minimal impact on print quality.