Hey Roy, it's mostly an ergonomic thing. Whichever feels best in your hands and when shooting. Both reliable pistols. I'd venture to say that the 27 is a little more snappy but, that's just me. hope that helps!

I only own the P320 Subcompact but have shot both. I own several full size glocks and the G27 is just a smaller representation og the glock line in general. My opinion is that the trigger on the Sig is shorter engagement and a much crisper break. Other than the obvious trigger difference they are very similar. Not much functional difference at all. Also, I have large hands and the Sig is definitely more feel friendly to me as well.

Roy, I only own the P320 Subcompact but have shot both. I own several full size glocks and the G27 is just a smaller representation og the glock line in general. My opinion is that the trigger on the Sig is shorter engagement and a much crisper break. Other than the obvious trigger difference they are very similar. Not much functional difference at all. Also, I have large hands and the Sig is definitely more feel friendly to me as well.