I finally got around to trying this out. I printed the test print for the famous collapsible sword. I felt this was a good test since it prints 3 cylinders, nested in each other. The file size was 2.9mB and became .3mB.
The front part of the cylinders looks like they had a slight improvement. However, the back, where the z seam is located, appears to be much worse. Hopefully the pictures show it, but it almost seems like some kind of under extrusion right before the z seam.
And the strangest thing is that in the before-arc print, the nozzle would just go back and forth in the circle in very smooth motions. However, on the arc-enabled print, it would make a circle, but when it started to approach the z seam it would noticeably start slowing down over the course of about 2 seconds. Because of this, the print took a few minutes longer. Whatever that slowdown was is what caused the poor print quality but I’m not sure what made it do that. Could it be linear advance?
These 2 pictures are the same thing, but one of them, I am blocking the light with my hand to reduce glare. The top ones in each picture are the arc-enabled prints.