Acetone leaves less of an oily residue than Xylene. This might make it a better substance for cleaning mating surfaces.
I have cans both, as I use xylene to clean my expensive brushes of two-part epoxy used in fly rod building.
Xylene does not clean up in water. Spill drops on the driveway and let it evap. A water rinse will still bead up there on the residue.
This does not happen with Acetone.