Hmmm. Any of them that I have handled before installation , the edges while square as per most metal profiles haven't been as sharp as a razor though. Maybe different…

Yeah we have the 900mm tile insert shower grate in our rental and never had an issue with it while taking a shower.
However when I went to clean it like…

I know my wife has cut herself when removing the stainless grate to clean the drain trough. The edges on the grate are very sharp.

We dont have this issue with ours....