I doubt I am getting fakes from the big Aliexpress sellers, and I don't even see why anyone would try to fake commercial H3N, it's pretty darn cheap to begin with. They all had the authentication hologram and every little detail between the sheets I bought in the past matches.
I had some issues where the sheets were not cut straight, that was with red sheets only, but this is something I don't care much about even if the logo is not centered I wouldn't care too much.
I mean in play for some reason the sheets from EU stores were better. Those were all more elastic and not so rigid. I bought a H3-50 once and that sheet was super clicky and alive, then I bought the same from Aliexpress and it was quite dead in comparison.
I normally would prefer the Aliexpress sellers since some let me chose from hardness between 37-41 and they have 2.1, 2.15 and 2.2mm thicknesses. EU stores don't have this variety of choice, the rubber has either soft, medium or hard sponge and thickness availability sometimes is not even selectable or I order 2.1mm and they send 2.15 or 2.2mm.
If I only got 1 or 2 sheets from EU where the rubber played better, then sure I won the caoutchouc lottery but it's been like 4-5 times already which made me question why is it.