Foam bits vs 'Regular' bits?

X-Carve Parts & Files
1

What is the difference between a 2 flute spiral foam bit and a 2 flute spiral end mill? Specifically, what advantages do I get by using a “foam” specific bit.
Inventables sells this foam bit. Why can’t I just use a 2 flute up cut that doesn’t specifically specify ‘foam’?

Thanks!

2

The twist is the flutes are greater distance. like a coarse thread screw vs a fine thread screw. It will clear the foam up and out quicker.

3

Thanks! Do they prevent foam curls from wrapping around the bits as frequently?