My problem with Uniqlo is that they changes cuttings, Materials and some other minor details all while showing the same label. So they will look 95% the same, even material is pretty much the same.... but it is still "different". ( The Item code will be different ) Not to mention Uniqlo's quality depends on its country of origin or where they are sold. Uniqlo in Japan is really a bar higher than Uniqlo around the world. ( Which is pretty much the same with everything in Japan, domestic products tends to be of the highest quality compared to Export)
So if you are picky about these sort of things Uniqlo tends to offer inconsistency.
I have been wearing Uniqlo t-shirts most days for the last few years. The codes change regularly on those. I have a few from a version where the bottom hem is always curling up on itself. The rest of them just hang straight and flat...
I also have some Uniqlo underwear that changed code where the old ones fit well and the new ones didn't.
I'm still a happy customer, but it does mean that I have to be a little cautious about buying 5 more of something just because my previous experience with it was good.
Ahh, I never paid attention to the code, I guess they would "update" the design over the time?
In my country, Indonesia, I would guess the quality bar from Uniqlo would be pretty low since it's in SEA, but compared to local brands, I think the stuffs Uniqlo makes are really good, I loved shopping in Uniqlo.
So if you are picky about these sort of things Uniqlo tends to offer inconsistency.