I've been told that Chinese and Taiwanese companies have no concept of brand loyalty, and are given to renaming themselves without any thought to how it might reflect on them.
There are companies where this appears not to be true; for example, it appears that most Alps clone keyboards used switches from Himake, now part of the Hua-Jie Group. That includes keyboards from Strong Man, Focus, Monterey, Ortek and many other companies. The switches are identical inside and out including the number stamping on the moulds.
However, there are a lot of companies that just appeared and then seemingly vanished, or seemed to rebrand. For example, KPT (from Keypot) switches and TEC switches are obviously from the same factory, but they seem to have changed name. I don't know whether a Chinese person could dig into any records and see whether "TEC" became Keypot or vice versa. There are also more switches that seem awfully similar, but are unbranded. This is the sort of shenanigans they were thinking of.
If your ATTI clones look the same as the ProWorld ones with the exception of the branding, it wouldn't surprise me if that's another company name change.
This is alps.tw's collection of MX clones:
http://kbtalking.cool3c.com/article/18452None of them look anything like 2ters — his omit the LED recess, which is really unusual. One thing I do notice about all his clones, is that the stems have little spurs on the ends of the side ramps. Photos 8 and 9 depict the Yali/Aristotle ("亞驪企業有限公司") switch; the other switches have enough similarities that they may all be Aristotle, or it may be like Alps clones, where the cloners clone other cloners.
Cherry MX clones are too rare for anyone to get a handle on them like we do with Alps clones. The only commonly found one is the Aristotle, and I got the manufacturer of those from Chicony. Aristotle themselves confirmed that they no longer sell them.
It's like the Alps vortex all over again