No way would I think a Norinco 1911 is of equal value to a Springfield, such as a NM fitted barrel Range Officer ($750 used). You can't buy a Norinco beavertail grip-safety, one must be hand fitted by GunSmith or machinist. They are not superbly accurate, and a couple years ago they were commonly found for $350 at gunshows. Also, how would you know whether it was a "factory" plating rather than a hobbyist job? I'm not beating up Norinco 1911's, I've owned one for 18 years.
Not to be an ass but most all 1911 including Springfield require fitting of a beavertail. Dont belive me try to install one. I had a norinco 1911 and it was every bit as accurate as my kimber or Springfield. These are very desired if it is a Chinese norinco. These are one of the few production pistols that wilson combat or any other major pistol smiths will even touch. Almost all 1911s are hand fitted or they simply would not run. If ****s to slopy they have issues. if its to tight again they have issues. The steel used in the norinco is some of the hardest steel you will ever find in a 1911.
Try and get wilson combat to work on your Springfield its not going to happen. This should be enough to tell one the norinco is of higher quality steel.