Funnily enough, I was going to mention that the Gitzo ones are probably properly engineered, higher quality steel and treatment.
I have seen so many cheap Chinese rip off stuff break or be of such low quality I will not risk any of that stuff anymore - it really is noticable how much lower quality stuff from China is.
A friend works in one of the foreign trade departments and the not so hidden blatant industrial theft that goes on in China would make your hair curl - Mercedes are finding this out now. They have built a plant in China, complete with Mercdes staff overseeing the installation and production - but they have no control over the identical plant being built 8 kms away by people who work in the Merc one by day....it won't be long before this second plant is churning out Muckedes clones.