I prefer 1.60 for drills, it finishes with a very clean edge, I have never chipped one, and the drill holes are clean and straight. We get more irregular drill holes on Trivex, the edges don't look as crisp, and patients are dissappointed that its just not that much thinner. It has the perfect amount of shine on the edge, not too much.

Most premium rimless lines, like Lindberg, recommend 1.60 over Trivex and Poly.

Poly has been cracking more and more the last few years. I order it extra thick to compensate, so it ends up thicker than 1.60.