I put the two ESR ones side by side and ran my fingers across them and felt zero difference in thickness, but they do have the front and back film on them.
I peeled the film on the front corner of each to try to get a sense of the anti-reflective feature on them but couldn’t see a difference between the two. I don’t know the proper way to compare AR though since I put these next to my current phone and ipad that don’t have AR screen protectors and they seemed to reflect my ceiling light equally.
But I’ll probably stick with the ESR Corning version. The difference between 3 for $20 or $30 doesn’t matter to much for me so I’ll just go for the more expensive option with the thought that it actually is better even if I can’t ell. I wanted to go with the seemingly more premium TORRAS glass but the feature making it edge-to-edge doesn’t appear to be case friendly.