To my knowledge THESE ARE BASICALLY COLTS.
Argentina paid Colt a large sum to basically build a 1911A1 factory in argentina, and to instruct it's employees in the building, and inspection of these weapons.. Every one I've had a chance to inspect has proven to be 100% interchangeable with a M-1911/M-1911A1 as far as parts, and quality. However, many of the later Series 70/80 parts will not fit, but this can be said of Colt made 1911A1's, and the series70/80 parts.
The "Ballester Molina", and "Ballester Riguad" are later, "improved" versions. (In my experience, the Ballester Molina is adequate, but not in the same leauge as a Systema 1927)
Just because it's made in South America, don't be worried. Argentina is definitely an industrialized country that can make a reliable piece..
Meplat-