With the small size of an Excimer laser used for laser eye surgery, we will think of it as a paintbrush size. It is very difficult to do fine art with a house paintbrush. So obviously the smaller the brush you are using the more detail you can paint, you can carve. Of course the smaller the brush, the longer it will take you to paint an area. So there is an interplay between the spot size and the speed of the laser and that is all technical stuff but generally speaking small spot lasers are better than broad area lasers.
