Question about acrylic

Hello, and thank you in advance for any useful information you might provide!
My question is whether or not acrylic of a given thickness will flex to the same degree as PETG of equal thickness. In order not to be cryptic, let me clarify that the point is to determine whether or not using 0.080" acrylic would yield the same result in terms of a Part 3 hockey mask “bending” to conform to the head of the wearer by way of the strap producing tension due to it pulling against the wearer’s head from behind as do the 0.080" masks that Auzorann and Crash Cunningham make out of PETG and, of course as the screen-used masks “bent” as well. Thanks again!

So is it that no one has any information about this, or do people have a problem with me on this site?