This is the "BMW vs. Mercedes Benz" of guns. Take your pick; there isn't a wrong answer between them!
Have you had a chance to at least hold them both? The SIG is a 1/2 pound heavier. For some people, that's a positive; for others it's a negative. Personal preference, really.
Oh, and welcome to TFF! When you do make up your mind, we want to see some pictures.