I posted word salad.These XDs have small beads, they date themselves.
What I was trying to say is late 80's: The Aviar small bead comes out at about the same time as the XD adds a small bead. Mid 00's: The Avair small bead is converted to beadless and the XD also becomes beadless. It think that is because they share the wing mold piece.
The discs you posted are consistent in date to what I was poorly trying to say.