P220 holster and 4506/1006, The S&W is a bit thinner, but it is longer. So dependent upon the holster a 1006 will not fit in a holster made for a 220.
P220 holster and 1076/4566, these fit quite well.
I have a Milt Sparks for the 220, my 1006 will not fit into it well enough to use, it sticks out. Either my 1076 or 4566 fit OK just a mite loose.

Fit the other way is a no go the SIG will not fit into holsters made for the S&W that I have.

The dimensions of the 1911 are not enough similarto either the SIG or S&W for a fit with any of the above, unless you have a very sloppy holster.

My advice; try before you buy.

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