Here is an example from the thread.
The green arrow shows how mushy where the facet meets the top tooth. There is a line there that reflects light as its not sharp, its rounded.
Same with the red arrow, but this time between facets. There is a line that reflects light as its rounded, not sharp. Yuk.
The blue arrow shows an actual facet not being perfectly flat, so it reflects differently than the gen, which is perfectly flat.
My point, is its a really big tell if you have spent time around gen bezels. It just looks very different.