Hello, yourself. Welcome to the forum.
Please don't capitalize every word you type, because It Makes Your Writing Very Hard To Read.
Which piece of the Taurus 1911 came loose? When you reassembled the pistol, did it work OK, or did the piece come loose again?
The 1911 is a single-action semi-auto. It's a good, if old, design. Its reliability, when properly manufactured and assembled, is excellent.
The Springfield is a kind of double-action-only semi-auto, with a very different (from the 1911) trigger arrangement and feel. It seems to be quite reliable, too.
I personally believe that the Springfield is better for concealed carry than is the 1911, all because of the difference in trigger action.
The Springfield's "plastic" frame is quite strong enough for its intended purpose, and is functionally neither better nor worse than the 1911's metal one. Both pistols should last equally long in service.
Did that information help?