With circles, you get a spot of overburn at beginning and end which may or may not cause a problem for you. There has been some work done to removee those with paper using engraves and with other materials using lead-in/out easing.
Here’s a discussion about it with acrylic:
and
Where was that recent lead in path post. Hmm. I dunno, I can’t find it. Basically you have your path curl up and away from the circle, so the laser doesn’t slow down .