i own both and can describe the loaded chamber indicator for you, on the sigs, it isn't very obvious unless you know what you are looking at. loook at your sig's ejection port from the side, with your grip to the left and barrel tip to the right. at the bottom left corner on the ejection port, there is a horizontal rectangular peice of steel about 1/8" by 3/8". when you look down on the slide from the top, this peice is slightly recessed into the slide while the chamber is empty. when a round is in the tube, the rectangular piece with become slightly raised to the side, indicating a round is in the chamber. slightly lame, and i still manually check the chamber with sigs. my berettas have the same style, only more axaggerated and easier to 'read'. i personally keep all my handguns loaded unless i'm cleaning them so that i don't have to wonder if i have a round chambered or not.