Isn't sheer speculation nice?
Yes, Ron, sheer speculation not only is nice but it's also FUN!!
So, keeping in line with the speculation, let me play the game and speculate that Colorplus 200 and Gold 200 are exactly the same emulsion, BUT Colorplus 200 is leftover stock that did not sell during the circa. 2008-2014 "film debacle" years, while Gold 200 might be either (a) current production or (b) the latest batch.
Another option (More speculation) SPECULATION SPREE!!
The "Lucky" film factory produced color negative emulsions under license from Kodak and/or the Kodak Chinese factory used to produce color neg emulsions with technology related to Kodacolor Gold.
Colorplus 200 is the remaining stock from this factory. BTW the enthusiasts from lomography widely believe that the stock of the Lomo color neg ISO 100, 400, and 800 film that was marked as "made in china" came from the chinese Kodak factory and was based in Kodacolor VR. The ones marked "made in italy" have been identified as Ferrania.
And the slightly "muted" colors would be explained by the stock being not so "fresh". Color neg film loses speed with age (and in my personal experience Gold 100/200 from 1997 lost more speed than Fuji Superia 100 from the same date, stored under the same conditions). When the film loses speed, it gets slightly underexposed when used at box speed, which will give prints with less contrast, which subjectively is seen by the eye as reduced color saturation. It would, thus, be interesting to shoot Colorplus 200 at ISO 100!
PS: I found your response to this topic reasonable, and, as an engineer myself, I find very professional from you that you take the care not to release Kodak's private information if you're not entitled to do so.
Kind regards,
Flavio