Out of the two, I would choose the "RIA GI Milspec 1911". That's a hard one.
(Bersa) [Pros]: Low Price, lighter trigger pull, beavertail grip safety, left hand friendly (not ambidextrous), very accurate, fires HP flawlessly, and an extended slide release and safety. [Cons]: Bad Sights, and Odd Magazine.
(RIA GI Milspec) [Pros]: It has everything that the Bersa has but, the sights are great and the magazine is more comfortable. [Cons]: No beavertail grip safety (compared to Bersa), and very very rare FTF Problems.
I still would choose the Rock Island Armory GI Milspec 1911.