There are several advantages. For one, it has a higher holding torque, so less anxiety when doing multiple tool changes. The other main reason is you can run your machine faster. I was doing 3/8" DOC at like 60IPM in hard oak a few days ago (and it will go faster for sure). It allows you to increase max speed, rapids, etc. My machine physically moves quicker than a stock machine. Usually this upgrade is done in tandem with a 9mm belt upgrade. Also, the motors generally have higher torque across the band, so even when running slower they have more power than the smaller motors which is good for aluminum and other hard materials.
