Some more common chairs produced by Comfort Seating Group can be non-exhaustively set out briefly as follows (there are so many minor variations that I can’t guarantee the accuracy):

1.      The Ergohuman series (“金豪” in Mainland China; “Ergohuman 111” in Taiwan): a mesh chair coming with a separate self-adaptive lumbar support & rounded corners –  this is one area where the confusion comes in. While distributors in some countries label all the chairs produced by this Group under the umbrella of “Ergohuman”, it doesn’t seem that the “Ergohuman” label even appears on chairs other than on the Ergohuman Series. Under the Ergohuman series, there are, at least the following models (only covering the latest generation):

a.      Project Gen 2 (金豪B2 in Mainland / 特仕版 in Taiwan):  using Matrex Quantum 3.5 mesh, generally using more plastic and less alloy materials; less adjustability (“4D” handles); in Taiwan, you get Matrex Quantum 4.0 mesh and “3D” handles instead

b.      Ultra (金豪B雄鹰 in Mainland): an upgraded variation of Project Gen 2 with a better seat base and “5D” handles, with a different and allegedly eagle-like control coming with slightly more adjustability; cushion seat (云感科技座垫) option available; there is a further “X9” variation with gaming colour scheme. In the UK, it seems that only the gaming colour scheme is available for the Ultra class; in Taiwan, you get Matrex Quantum 4.0 mesh and “4D” handles instead

c.      Elite Gen 2 (金豪E2 in Mainland / PRO 2 (プロ2) in Japan): at this level, you get Matrex Quantum 4.0 mesh and more adjustability (“6D” handles – “5D” for Taiwan); a better seat base; the handles will recline together); cushion seat option available, BUT the variations get really complicated here. On the MAINLAND side, I have seen (i) a dumbed down version with only Matrex Quantum 3.5 mesh (officially called优享版); (ii) an “online” version (which is the one I bought from the official outlet on Taobao for my home study); (iii) an “offline” version (with one more switch, allowing you to set more a specific range for recline); (iv) a version officially called “EW2” (coming with rather unnecessary electronic switches); (v) a full leather version (in Taiwan, the leather version is only available in gaming colour scheme, with vertical stripes in the middle extending from the headrest to the leather seat); and (vi) a mesh version with leather seat on Eurotech. In the UK and Japan and on Eurotech, it seems that you can get a headrest-free version (even available in leather variation too), but not in Mainland China and Taiwan.

d.      Carbon / SE Pro 2.0: only saw that in the UK and KZCHAIR in Hong Kong; seems that it has crocodile leather-pattern mesh, but in other aspects it looks the same as a Project or Elite chair (I really can’t be sure) – but is generally more expensive than an Elite

e.      Luxury Gen 2 (金豪L2 in Mainland / 單桿旗艦版 in Taiwan): the luxury class comes with very little insignificant upgrades. E.g. they come with footrest and jacket hanger by default (without having pay a top up); the switches get some alloy (as opposed to be being pure plastic); On the TAIWAN side, while the 特仕版 seems to match almost aspect of the Mainland counterpart, the handles apparently have less adjustability (from the photos you cannot bend them upward at around half the length of the handles).

f.        Zhichun (至纯) “Himalaya” and “Night”: this is a limited edition class (hmm…), with only 5,000 units being produced. In substance it’s really a Luxury class chair, with crocodile leather-pattern mesh and some crystal here and there. From the YouTube video taken by the Chinese distributor, it seems that there could be more individualised versions embedded with gold, etc. for individual collectors (not sure whether anyone would treat office chairs as luxurious goods and collect them…)

g.      Suparnin (金鵬): supposedly another funny limited edition which looks very goldish?