OK, let's just recap here. Are single flute cutters to be preferred over 2 flute (or more) cutters when it comes to working with hard woods such as oak?

We mostly do detailed (depth 5-10mm) v-carving and flat bottom clearance in small areas and therefore the feed rate rarely seems to get up to max' rate because of the stepper motor acceleration and de-acceleration times; feed rate typically 300-500mm/min.