Springfield uses less MIM parts IIRC, Springfield has a lifetime warranty. Springfields have a better reputation for "out of the box reliability".
As for S&W, if you're looking for a 3" S&W only offers one model of 3" 1911 while SA and Kimber have more options. S&W also carries a lifetime warranty, but some examples I've seen have been a little rough in the fit dept. I doubt it matters much to you, but S&W uses and external extractor, but so far no one really has any complaints on their rendition of it. Some favor the standard internal extractor for parts availability etc.
What exactly are you looking for on the gun? Steel frame? Aluminum? Scandium? .45ACP or other? Night sights? Stainless? Two tone?