Love my 1911 - 110 years and only a few mods to J. B.'s design and it is still the most produced model in the world.
When carrying, if one wants to be able to pull and be ready to fire, the 1911 MUST be cocked and locked. This adds one more step after drawing before it can fire.
The DA/SA (e.g. SIG P220 Elite or Legion) has a decocker. It can be carried ready to pull and fire in one step.
Another benefit is under stress (such as if you have to pull in self-defense), a twitchy finger may unintentionally fire the SA at 3-5 lbs. while the DA/SA (P220 with SRT) has a whopping 10+ lbs and long first pull, avoiding twitchy discharge. Afterwards the SRT goes into 3-5 lb mode with a much shorter pull.
TRAIN, train, train; practice, practice, practice. I do find this option of the P220 Elite (SRT model) safer and more efficient for pulling and firing than the 1911-style (which also has no decocker). Use a holster that covers the trigger well, protecting from accidental discharge with a round in the tube.
Also, the SIG is more accurate out of the box with a 4.4" bbl than the 1911 (both in 0.45).
I spent many hours comparing my two SIG 0.45s and, as I love the 1911, I reserve it for the range and use the P220 Elite for carry.
Both pistols are extremely reliable with proper ammo. SIG added an external extractor to the 1911 to avoid jams (they improve everything).
I had an all-stainless P220r-45-sse; it is a bit more controllable in rapid fire due to the added weight of all-SS. However, I do prefer the newer P220 Elite with alloy frame - it is much easier to carry; I barely feel it.
Any comments?
Jonny