Both can be great guns, the 220 is likely going to be more of a sure thing there, right out of the box. Ive owned a number of both, and the SIG's all worked out of the box, The 1911's, not so much.
If its going to be the first of either for you, Id probably go with the 220 first. Learn to shoot it (and they are easy to learn), and youll be a better overall shooter in the long run. DA guns are not the boggey man the SA shooters will tell you they are. If you cant shoot one well, its not the guns fault.
SIG's DA triggers are very nice, and their SA triggers as good as any of my 1911's.
Another thing with the SIG's, if you like the "smaller" versions, the SIG 220 "Compact", and the P245, its predecessor, work just like the full size guns, and arent the least bit finicky. Ive had a couple of 1911's that were shorter than Commander length, and they were mostly trouble.