used rubbers no, but you can contact Heming or check his channel
He had a vlog about it, I think it was FZD's rubbers he got
I only used one of the kids that trains at our base, where his personal coached arranged 5 pairs of player edition through Ma Long. As I commented before, I'm not sure if they are commercial ones or Ma Long's own one, but I did comment on the usage experience before - where the spin is just way more (I can "eat" into the ball much better). The quality was just beautiful, but it wasn't matte, so now I have my doubts lol
But since I use ALC blade, the blade on there was SZLC (Lin Yun-Ju's personal collection one)
So, I cannot really say how much better, but the topsheet quality is better than nationals that I use.