I have a Chinese carbon frame. It's the same design as a Fuji Altamira Disc. What I have no way of knowing is how the carbon has been put together in comparison to the Fuji or even what type(s) of carbon is actually used, only that it has the same outside (eg mould) dimensions.
Now, I spent a long time researching who to buy mine from and it's a company that has a good rep and I haven't yet found an unhappy customer or tales of issues with failures. Obviously the volumes are lower than big brands but given that many/most people buying Chinese frames are doing so after finding them online, I don't think it's unreasonable to assume that they'd post online to complain if they had problems.
As it goes, my first one did crack (not in a catastrophic way but a warranty failure still) and the Chinese company were very good at resolving it. Certainly better than many peoples' experiences of 'proper' brands.
So, my point (finally) is that using the same mould means little. As above, QC, etc can massively affect the product so you need to pick a company with a good reputation.
A bit like buying any bike even if it doesn't come from China...