If you were looking at two non railed used .45 ACP 1911's, both with around 1000 hardball rounds through them. Which is the better pick and why? One is a Springfield 1911A1 and the other is a Rock Island Standard. Both look about the same in the finish to me. Both trigger pulls are within 1/4 lb of each other and the pull and setoff is close. The big difference I see is the Rock has an ambidextrous safety, a plus as the gun is carried on left side.