They are both fine .45's that go about business in very different ways. The Glock 30 is about 24 ounces unloaded and the Springfield 1911 full size is about 38 ounces unloaded. It also depends on weather this is a carry weapon or just a shooter. You must get them in your hands to really see how they feel. I prefer the Glock 30 over the 1911 for a concealed carry weapon for it's lighter weight and smaller dimensions, and if you really don't care about high caps, the Glock 36 is even smaller and lighter. Some shooters do not like the Glock's point of aim and overall feel. I like the 1911 as a SHTF sidearm or as a shooter. Very strong and reliable. Proven in combat many times over. However, it is all very personal and different for everyone. Also, I like my weapons very close to perfect out of the box. The SA 1911 can be modified more than just about any pistol made, but I think the Glock 30/36 is already optimized and very accurate right from jump. Good luck with your new weapon.