Sig, hands down. Fits better, feels better, shoots straighter, eats everything, lasts longer, and easier to tune, if you're into that sorta thing. Add a set of Hogue grips, and it's near perfect!
And in that price range, it's only a matter of degress, all politics aside. Sig has a better service department, too.
I prefer the Sig, and I have carried and used Sigs, Glocks, and Smiths.
The most important thing is to get what fits your hand best, and has a grip size/trigger pull legnth and spacing that you're comfortable with.
Tom
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A "Miss" is the ultimate overpenetration!
You can never be too rich, too skinny, or too well armed!