While there is nothing wrong with RIA 1911s, of the two I would go with the Norinco. The slide and frame are forged, while the RIA is cast. Also, as stated by others, there aren't any more Norinco 1911s being imported. Ultimately, the Norinco would be a better base gun should you choose to start customizing it.
Between the two pistols in question, this is the main reason I would also opt for the Norinco (is the slide of the RIA also cast? I thought that at least the slide was forged on the RIA)-though conceding that there's a lot of question as to how much better a forged frame is when compared to a cast one, everything else being equal.
Also, imo, I don't see the Norinco ever becoming a sought after collectable just based on its relative scarcity.