Several years back I spoke to a one of Turner Kirkland's sons about the Italian made repros, and back then there was some real junk out there. He said then most of the guns came off the same production line, just different grades of quality and finish. Do you want the 200 lira special or the 3,400 lira target quality, and everything in between. Guns that had parts interchangeable with originals or metric screws. cheap blue, good blue, case hardened, etc. polished brass, sanded brass, rough brass or the same selections of steel, When I first looked at Italian revolver kits (1967), some had to be timed by a gun smith because the chambers wouldn't even line up with the barrel.
Now whether a Cimmaron is actually better than a Uberti? you'd have to compare the two.
I have a rifle that was made in Italy under contract with an American named Garret. He had a run of Sharps rifles made to his specs. Then he checked over the ones the Italians shipped to him and he only passed a portion of those to be sold as Garrett Arms Sharps Rifles. Mine purchased directly from Mr. Garrett, came in a red box marked "Palmetto" I recently heard that he was very particular about the quality of rifling the Italians were to put in his rifles and special quality tooling was made. that Pedersoli some how ended up with the tooling. Which may account for the good showing of the Pedersoli Sharps rifles in BPCR competition. I also heard that in the early 1970's when Colt started "remaking" their cap and ball revolvers, that they or at least some of the parts were made in Italy, to special Colt quality standards, so that the parts would interchage with the originals.
Hope this helps answer your question.