We had quite a group of SIG fanboys at my club, six-eight years ago. There were five or six of them, and they were all acquainted with Bruce Gray of Grayguns; he's probably the foremost SIG 'smith in the country.
I've shot a full-house Grayguns custom P220, and it's nice, for a big, DA pistol, but it's no 1911 in terms of shootability (is that a word?).
That said, if you're carrying the SIG every day, I'd shoot that in IDPA competition.
I always wondered about, say, cops who carried guns on duty with DA triggers and decockers, but who shot 1911s with manual safeties and 2# triggers in competition? I would not want to have a "what gun is this?" moment if things get serious.
I focused on the 1911 early, and virtually all of my carry guns, competition guns, fun guns, fondling guns, are 1911 style. All have ambi safeties, triggers with approximately the same pull weight, square post/square notch sights, etc., so there's no adapting when changing from one gun to another.