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. Just my two cents.
GLOCKS- (19 Gen 4, 20SF, 21SF, 30SF, 42, 43), Beretta 21A Bobcat, Spreewerke CYQ P38, Remington R1S 1911, Patriot Ordnance P415, Patriot Ordnance P308, Sig 556 SWAT Classic, Colt LE6920, Kel Tec KSG, Norinco NHM90 5.56 converted to pre-ban configuration, 6.5X55 Swedish Mauser CG 1903 M96/38, Swiss K31 7.5X55, BNZ 42 K98, Mosin Nagant M91/30 1934 Tula, Ruger 10/22 50th anniversary design contest rifle, Tikka T3 CTR, Winchester 1200