I will say, in my experience, the Beretta has a much smoother and consistent DA pull. Now, I will say I did put a D spring in mine (which is a very, very cheap and easy modification that is perfectly acceptable in terms of reliability) so that might help as well. The Sig has some stacking toward the end of the DA pull, but not the Beretta.
I will also say that what shoots better is not necessarily the one that feels better in the hand. I've probably never picked up a better feeling pistol than the P226 I had with the E2 grip and short reach trigger. That gun felt like it was made for me. But, in the end, feelings didn't translate into down-range results and the Sig, for me, was decidedly average in the accuracy department whereas the Beretta is outstanding. For having such a fat grip, the Beretta's trigger SA trigger reach is is actually very manageable.
I'm not bashing the P226; they are great pistols and some people will shoot them and prefer them to the Beretta. If you have a chance, find a range where you can shoot both.